I see no problem with Bonaire for learning and improving your skills. The wind may have a higher average there, but you will have access to rental gear of appropriate sizes. There are 2 excellent rental places, right next to each other, and the instructors are fine. The water is warm, and shallow, and you will be inside a reef so there is no wave action. Plus the wind is onshore.
I've been there quite a few times. And seen never-evers advance dramatically over the course of 2 weeks.
2 months in Bonaire and you'll be the luckiest person on earth. What I wouldn't give for that!!! After that amount of time there, you'll be writing on the forum and not reading it! I say, go for it!