Quite a big step going from barely knowing how to root to releasing your own ROM - I've been rooted on and off since May (or whenever the first rooting method was found) and although I make my own I'd never release them. Would get sick of people asking me to add this, remove that, update it, etc...
Then you have to look into kernels, modules, scripts, etc...it's not as simple as taking a ROM and remove a few apps. Doesn't take long to get your head around but I'd stick to running it yourself until you're confident that 1. it works, and 2. people will want it - baring in mind almost all ROMs are essentially the same bar a few custom wallpapers/themes