How To Get Started?

I'd like to get started on seriously coding for ROTMG things and didn't know if somebody could help me get pointed in the right direction. I have coding experience, but it isn't in Java.

/If you want to modify thing in the client then get rabcdasm and learn how to code in avm2, there is a good documentation on adobe's website. To make proxy, server, client any programming language is good, you don't need java. Decompiling rotmg and learning how it works could make your life easier, get either ffdec, as3 sorcerer or sothink swf decompiler. Take a look at the currently released hacks and sources how they work.