In one sense, the whole of perlmonks is devoted to some form of mentoring and information exchange.

If you want to start writing modules, taking an OO approach, the best way is probably to find a module you like the looks of, understand the code and start replacing it with your stuff. In other words start off with a skeleton. Personally, I started with the CD modules in Damian Conway's Object-Oriented Perl book as templates and built my first OO math module in short order.

With repsect to the mentoring, once you start writing code, you will discover concrete problems and uncertainties that are amenable to posting to SoPW. I have almost always recieved helpful advice from questions I asked, and the typically broad range of answers helped me put the different appraoches to solving a problem in perspective.

Modules are a lot of fun to program. Good luck!