Some corrections and notes below:

A fake silly short story from Anki App failed cards.

It was one of the muggiest days of summer, I was sitting at the border edge of the swimming pool, cooling my feet in the shallow end trying to brighten up my day. Gnats were flying all around me like soldiers going to strike a beleaguered castle  laying seige to a castle. Gutted, this is the perfect word to describe my mood.
"Paolo, come on, my father is waiting, he wants you to look a contract over before signing stamping his sign on it", Monica called to me from the bathroom. She is my girlfriend and her parents are well off; working even on weekends is part of the price of having a lot of quid.
I have had been trying to put off this moment, anyway, but now I put aside my lazyness and quickly stood up to get a quick shower, wear put on a suit dress, and voilá, ready to go. Gloria bring me forward told me to dress down, "Don't put on a suit, my father only needs some help, he is no gonna give** you a job", "Sugar! Well, I hope working few hours on a sunny day in the summer in order to advance the relationship with my future father in law is worth it".
Dont' To be continued...

Thanks in advance to lose your time for taking the time to check my writing text.
If you think that this little story makes has no sense...you are right!
If you want to improve your italian or spanish, feel free to contact me to start a language interchange, I wanna learn english.
Have a nice day.

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Really well written! I enjoyed reading it.  Bravo!  I made just a few corrections (we use 'edge' for swimming pools rather than 'border';  I added a few bits of punctuation around quotations; I think you mean "suit" rather than "dress")

The only part I was unsure about:  "He is no gonna give you a job" is a kind of English used in the southern United States  but sounds uneducated/really informal.  It's probably better to say "He is not going to give you a job" if you're trying to speak proper English but I wasn't sure if you were trying to make Gloria sound like someone who isn't educated. 

8 uses of "time"

A LONG TIME AGO I signed up for Facebook. Initially, I thought it was a TIME-CONSUMING social network, but I changed my mind IN NO TIME QUICKLY*.
Facebook was useful for chatting with my friends and for finding job offers.
I used it TIME AFTER TIME ALL THE TIME** and I didn't realize that it was not a good a bad habit. AS TIME WENT BY I dedicated myself only found myself always on the Internet. So AT ONE TIME OR ANOTHER*** I decided to take a break and to spend my free time with my family and my friends. It was a great decision and I felt good.
But it was ONLY A MATTER OF TIME: a few days later I started up Facebook again.
However, now I'm not so FB addicted as I was. I still use it that social AT TIMES**** and only if I did have done all my tasks.

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Well done.  I made a few changes and have tried to explain them:

* "Quickly" is really what should be used (sounds best in English) but if you have to use a phrase with TIME in it, I think it should be "IN NO TIME AT ALL".  "IN NO TIME" is understandable but sounds a little awkward

** I would use ALL THE TIME for this.  "ALL THE TIME" is used for general actions that are repeated;  "TIME AFTER TIME" is used for specific actions that are repeated.  So it's "I read all the time"  -  but "I read 'War and Peace' time after time before I understood it" because it's reading a specific book.

*** "AT ONE TIME OR ANOTHER" suggests that you don't know when something happened; in this case, you know when you stopped using Facebook so it's "ONE TIME" or even "A FEW TIMES".

**** I added this just to give another phrase you could use. :)

Essay

Nowadays, more many people claim that spending money on exploring space could be a big opportunity for the future of humanity; however, there is a strong argument that we should use the same money on improving the life on Earth.


Firstly, it is clear that the main advantage of exploring space is the chance of to find a new planet, which could save humanity after the end of the this world. Indeed, for many years, global warming has damaged the Earth, for example with rising sea levels as well as the climate change. Therefore the human being humans could live, in the future, on a planet which is better than the Earth, without pollution and many other problems.


On the other hand, all this money could be spent in order to solve the Earth's problems. Childrens of in Africa are kept in a malnutrition state, which could kill them easily. For this reason, if this amount of money was used to help these kids, the World would be best.


To sum up, there are strong arguments on both sides, but, I believe that finding a new planet is the best option.

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Overall, very well-written and only a few mistakes.  It comes across as very fluent. 

One advanced topic:  in the first sentence, I added a semi-colon to separate the first part of the sentence from the second part.  If you have a sentence that combines two thoughts (especially when you use 'however'),  it's best to use a semi-colon ( ; ) to separate the two parts. 

Well done!