I'm trying to write an essay about success to practice my writing

Lately, a frequently discussed subject around the world is success. Many people associate this  success with money and richness  wealth, but these two things aren't related.
It's not about numbers and banknotes; it's about personal satisfaction with something you have been doing with strength, focus, and effort for days, months or years.
As the famous writer called Stephen Covey said, "The key to success is dedication to lifelong learning". From this quote we can infer that it doesn't matter if you are rich or poor, since as long as you're happy with yourself and everything you have conquered accomplished in your lifetime, and with the things you have learnt from experience.

An abstract of my thesis

This graduate qualification thesis discusses Ecuadorian youth slang and the problems related to its translation into Russian.
The study consists of the introduction, two chapters, a conclusion, and a list of references including 40 titles, two annexes, and amounts to a total of 112 pages. The material for the empirical study was a list of 219 lexical units selected from non-professional dictionaries and lists of youth slang of Quito and Guayaquil.
The first chapter deals with the theoretical aspects of youth slang, theory <[Maybe cut this out because you mention theoretical aspects and theory. Seems repetitive?]and methods of its translation. The second chapter describes the survey results. Only four units in the list correspond to exclusively youth slang, while the rest is colloquial or low-colloquial vocabulary. The conversational text and the colloquial units were translated into Russian.
In the conclusion some general ideas about the Ecuadorian youth slang and its translation are described. The annexes contain the survey data and the translated vocabulary.

[Maybe use "appendices" instead of "annexes"]

A Delightful Surprise

Hello Alex,

This morning when I opened the mail box I found a parcel from Greece.
Thank you very much. You are too kind! I am really enjoying it.

About this book, I am fond of a story about mosquito coils.

"I light a mosquito coil even though there are no mosquitos because the smell reminds me of the summer time in japan"

Yes, the smell also reminds me of the summer days in the past.
The smell takes me home and evokes memories of my beloved family members who passed away.

The author wrote that mosquito coils made in Greece have a smell which was exactly the same as the smell of mosquito coils made in Japan.
I am happy to know that because it must be convenient for her.

I will send you a box of a typical Japanese mosquito coils.
Try them this summer!

Teresa

Got a new job

A job for me is not just about to getting a lot of money. It is all about passion.
I've tried to work in so many places , public catering , in a hotel, as an artist , etc. It took me about 5 years to find out what my passion is. I have a passionate interest in sports. Currently I'm working in the gym as a yoga and crossfit trainer. I start my job at 7 o'clock. I wake up at 5.30 every day and go to the gym daily. Before now It was kind of an impossible thing for me to wake up with the sunrise. But when you're in love with your job you could wake up at any time , you don't count how many hours left until closing, you're in the process [in the zone OR focused on what you're doing OR enjoying your work ]. This job gives me energy and fills me up with good vibes. , I like teaching people, however difficult it might be.

Can you help me to correct this please?

My rant.
In this article I want to talk about something that really annoys me. There’s one thing that really gets on my nerves: people who pollute the city. I live in Rome, I love my city and it makes me absolutely furious seeing people who spoil MY city. I don’t understand why people always do this. Italians are always clean: they take care of their own houses, they are obsessed with mopping the floor, dusting furniture and they consider it important to make a good impression when the guests come in their houses. However, when it comes to their city, they are completely selfish. They don’t care if they are spoiling the place. They only care about throwing away the object that they don’t want to have anymore. It seems very odd to me that they don’t realize they live in the same place they are spoiling, so I don’t understand WHY they are doing this! There are trash bins to recycle waste, but people carry on putting waste in the streets despite all and to make things worse, they complain about the bad state of the city and blame the mayor for it.

I’m sure you agree that some people have to learn how to live in a community.

The Plate Tectonics

You should probably know that the surface of Earth is made of plates, but it is more difficult to explain what happens inside Earth. Scientists have noticed that the tectonic plates of Earth only have two sizes: there are large and small plates[After a colon ':' you can just list what you're describing]. One should ask: Why doesn't Earth have a full range of plate sizes?

To answer that question, we need to know what happens inside the Earth. But this is easier said than done. Thus, scientists created a virtual model of a planet similar to Earth. After running this model during bilions of virtual years, they noticed that the virtual planet had the same two plate sizes as Earth. They ran it back to the moment these plates were created and noticed that the small plates formed where large plates sank into the Earth. They explained this by the fact that a large plate can't sink in one piece, so it splits into smaller pieces in order to be able to sink.

30 Days challenge - Chapter 4

Today I'm here to talk about my day . I went to university just for one class. I mean, if the teachers had been there, I would have had three classes today. But some bad things happened in my teachers' lives recently.
One of my philosophy's teacher sons died, and my law teacher's son is in the hospital because he is sick. I was sad because I wanted to have the classes, but it's understandable for them to miss in their classes under these circumstances.

correction

Hi, I'm mexicana, I'm a very kind person, I love the music, especially rock, grunge and metal, my favorite bands are Pearl Jam, Metálica [Metallica in English] and héroes del silencio, does anyone Can anyone tell me if I wrote this correctly? Because I've only been learning for a short time.