Hi Rodrigo, your suggested corrections are below (I have just corrected a few minor things). Writing a diary on Italki is a good way to improve your writing skills. That's a shame that you never finish your classes. The key to language learning is consistent practice so, if you keep practising every day (or most days) you will definitely keep improving!
I would like to study in Europe or in the USA so I am going to start using Italki as a diary. I hope to improve my English over time. I've been studying English for years but I never finish my classes.