Hi,

Great that you want to get involved! All discussion happens on the github repository over issue threads, feel free to comment on any that you have thoughts about.

This document gives an overview of the development process: (github.com/processing/p5.js/wiki/Development)[http://github.com/processing/p5.js/wiki/Development]

Any open issue is up for grabs, there's always general bug squashing that can be done. The issues marked "level:beginner" are good places to start, as is adding examples or fixing typos in the reference. If you're interested in working on something a bit larger, let me know.

Also, in NYC specifically there is a working group that meets up (regularly during the school year and sporadically during the summer). You can get on the list here: https://groups.google.com/forum/#!forum/p5xjs-working-group.

Welcome!