beginner

I just got SRB2 and so far it has been a blast! (get it?) What interests me the most about this game is modding. I like modding a lot, and I want to get started. So, how do I mod SRB2?

What it says on the tin. I'm making a video journal on learning to speedrun SRB2 with X Sonic (I'm so bad with him I've forgone trying to review him). I need 5-6 maps to do this on, as well as target times for those maps. I'm going to do the three big, popular choices for speedrunning I can...