Recently I started taking English lessons in a traditional English school, but this is completely useless (and expensive) without a proper pratice in writing or speaking. So, I'll try to break the shame and practice my English skills with your help, and of course that I'll be glad, if I can support you guys with my knowledge of Portuguese (not only the language, but also the local culture - speaking of which, the local culture is no less important than the proper language, because if you don't have this knowledge, you will hear, but not understand, even if you know the meaning of the word). 

Just to finish, in advance, I appreciate your corrections.

You're right, culture is just as important.