Learn English by myself

In the technology Era, there are many ways to learn other languages. For me, the most popular way is on Youtube. Some people are native Americans, but others are Brazilian. I prefer to learn with American people, because I listen to how they speak during the vídeo - when I learned with Brazilian people, most of the time the people speak in their native language and speak in English just in examples.
I practice listening most of time. It will help to improve my reading too. - although I have improved everything (read, speak and listening).
Sometimes, learning English by myself is so hard, because I might have a question, but I have nobody to answer it, and I need a lot of discipline.

I hope this helps! Any questions just ask me :P