I'm a big pedal guy too, and they can definitely help develop your creativity and skill as long as you don't use them as a crutch.
I've had my first 7 string for a few months now, and I've found that it's not too hard to pick up if you practice songs and such that utilize them. That's exactly why I bought a Scale The Summit book - band I'm familiar with, so I know what I'm working towards.
I'm not too privy on Brazilian/Latin music except for this dude my band played with a few years ago named Felix Martin. Granted, he has a very specialized type of guitar - extended range fused double neck. It's wild. Since we played with him, he's blown up and is a big time Kiesel artist now.
For improving your technique in general, go to Ben Eller's YouTube channel. He's a local TN guy, insanely talented, and makes THE BEST pedagogical guitar material IMO. He's worked with some big time acts and just has some of the best videos on the web IMO. Plus he's hilarious. Check him out now, ALL OF YOU!!!