I agree with you guys. It´s not for nothing that the site has attracted many learners - the right sort of learner, I mean, the one that find English interesting and even pleasurable.
I can tell you, it will make wonders to your life, be it to make you a well informed person, be it to help you out in a difficult situation...and the use of English to a number of things.
And that´s more, Thiago, I think you can use more exclamations to put more emphasis on your enthusiasm. To me, you have earned the right of using one here:
But I really think my English now is rather better than the English I spoke 6 months ago, I only knew a few words then, and now look at me! I'm writing a whole text in English!
Just kidding around, congratulations on your improvement and on your "follow-up text", you and a lot of others learners have taken advantage of the site, sometimes picking our brains, and then getting better by the day. Other times, making remarks, comments, follow-up questions, and teaching us a couple of things (or reminding us some things that we forget with time.)
Keep up the good work!