please correct my answering for this question

Q: Talk about a decision you made with someone help.

I would like to tell you about a decision that I made one year ago. The decision was to learn a foreign language, specifically, the Japanese language. I'm keen on Japanese culture, and I love Japan in general, so I decided to learn this language in order to see and understand how the Japanese people think. I began asking a Japanese learner [Japanese language student?] on the internet on Twitter about how I should start learning. She advised me to begin with the alphabet, and then you should buy a specific type of book (Genki) containing some stories. I took her advice and I bought some books from Amazon. At the same time I started learning the alphabet, and then I learned some grammar and vocabulary from the Genki book. In fact, I sometimes get bored, and I then remind myself why I chose to learn this language. However, I'm happy that I made this decision because I took steps to achieve my dream, and now I can understand some sentences.

thanks in advance.

Yes, you could say, "It's hot", or "I'm hot" or "I feel hot". "I feel hot" may be more grammatically correct than "I'm hot", but both are used in common speech.

A small piece of writing

I would like to inform you that the annual conference will be held at 10 a.m. next Tuesday. It's important to attend, since we are discussing whether or not put some new policies in place for the year to come. Please keep your presentation time within five minutes. Thank you. [Thank you is more formal, since this appears to be a formal notice].

Eating Sushi in Vancouver

It was 7 o'clock when we went out for dinner. That There was is a shop named "Sushi" which is on the way to school. My sister and I were talking have been saying that we would eat there someday. We wanted to eat Japanese food, and we missed to eat eating rice. But when we saw the menu, we found that there it was not anything like Japanese sushi. Sushi in this restaurant looked colorful, and avocado was used in it. It all seemed to be greasy, and what was used in Japan was the only eel but in Japan only eel is used. I ordered a Stanley Park roll with eels eel [or: I ordered Stanley Park rolls with eel] and my sister ordered some stuffed Roll, for which I forgot forget its name, in which avocado was the main ingredient. We also ordered miso soup for each of us,  and one dish of dumplings for two.

How I do my writing assignment

Every week before my English classes I have to do writing assignments, but I have a problem there. Usually when I start to do this I space out. I have a lot free time and a ready topic list, but I really don't know how to made  make up sentences and create stories about that for this. I can waste a lot of hours time in my attempts to imagine and write something suitable.
For example, yesterday I tried to start seven times, but in the end I failed.
By the way, I can't do it in Russian too. ['I also can't do it in Russian' would sound better.]
I think this may be related to my lifestyle, because lately nothing interesting has happened in my life.
I need an extraordinary mood and to feel good in order to do it well.
Sometimes It's happen it will just happen with me and I can do it, but usually not, and I have to wait for this to happen to me.

1 no less 2 clearly or no doubt [Both are fine.] 3 than those who have

Yes, strangely, they are both correct.

About guangzhou's weather

I think Guangzhou's weather is just like women's moods. Sometimes rainy, sometimes sunny. However, I also like Guangzhou. It has a lot of opportunities for teenagers.