Proball Type Mod

[Revenant]

I've been wanting to try modding for quite some time now, but I've never had any good ideas, and never known where to start. I finally managed to get a copy of quake 3 a few weeks ago, and I downloaded the proball mod (http://proball.planetquake.gamespy.com/index.html). I thought it was a really cool mod, but there was nobody to play it with . I was thinking it might be cool to make a similar mod for nexuiz, because the community is smaller and it will be easier to get people to play with me. Also, it might be a good place to start modding.

There is only one problem...

I have no idea where to start. Is there any good documentation/tutorials on modding dp? Or does anybody want to help out with coding or modelling?