Basically, just set up a dev environment and familiarize yourself with it and talk with one of our QA or devs to get some pointers at what to start with and start looking into that. Easiest way to contact them is on Discord.

Forum to look into is here:
https://www.swgemu.com/forums/forumdisplay.php?f=10

This is the thread for the dev environment
https://www.swgemu.com/forums/showthread.php?t=175307