Hey Vinícius, I'm brazilian too, can I ask you in which state you live in?
Here's my adivice: there are several vacations music courses you can enter in. I was in one of them last summer, in Brasília, and I can say I learned more things on 2 weeks than in 2 months with my teachers. There are teachers for all over the world there (great, as you already speak english), and I improved a lot with their help. Those courses can be good for you, as you seem to dislike conservatories. There are courses in Brasília, Londrina, Fortaleza, Campos do Jordão...