Correção de texto "Student's Opinion"

I'm studying at Uptime, and there I need write a composition about: "what do you think about the school". But, like I'm on the chapter 17, they told me that I 'have to' write it in portuguese. But my instructor (teacher) told me: "if you want write it in English, do it! It will be very good to the other students that are on the same chapter you are."
So, I wrote the composition in English, but like it will be exposed I'd like to know if my composition has some mistakes.

I love English, but I couldn’t speak and understand anything. And I also never got back into my English studies after another course that I made hundred years ago. But now, I’m studying by 4 months, so-so, and I can understand and speak a lot, and I’m just on the chapter 17. That’s awesome!
But on the beginning I didn’t know if Uptime would be a great course of English, because its different way to teach English. Actually, I thought I was playing at the lottery.
But now I’m so glad, because I’m improving my English every day. The teaching method, the teachers, the clerks, at last, everything makes the students gets off on the language.
I don’t know what I can say anymore. Uptime is better than I thought, actually is the best for me. And I’m writing this ‘little letter’ in English, thank Uptime and my instructor and friend Joiro, who is helping me a lot.