well I don't know how much you know about GA in the US, but yes I literally just rent a plane and fly off and do what I want.

Now as for where do I fly for advancement as in instrument rating (at the moment)?

I fly at KFXE, a place called FL Flight.

Despite what the large schools tell you, any instructor (provided he is a CFI/CFII) can take you from 0 - commercial+instrument. and if he's an MEI he can take you to commercial + multi.

There are plenty of schools down here and you can spot the ones that are targeting foreign students. they make their program seem like it's the only way to get a commercial license, but thankfully in the US we have the freedom of choice. You don't need to be part of a big school to get a commercial license.

I can move tomorrow to Alaska and continue my training elsewhere, it really doesn't matter. like jumpseat said, they will sugarcoat everything to get you to come to them.

and also like he said, at the end of the day you want to be somewhere where they can fit you in an instructor slot after they take you to CFI so you can get hours and a job. Even though I know you are going back to Brazil, these places will take you to 250 for comm, and even knowing people in Azul and TAM (I know people in both), you still need 500 hours to get in.

You will need to instruct, there's a 90% chance that it'll be true