Don't tell me what I should do ! >8U
Haha, just kidding. Don't want to toot my (or our) horn(s) with this, but Diokatsu and I are definitely pretty knowledgeable within these items. Ask any one of us for any questions you have. If you're interested in making a Beatmap, definitely talk to me first or ring a bell here...
On the StepMania hand (Yeah, I know this is osu!, but whatever), you can still talk to either one of us for help there. Dio's pretty good in his field, so us guys got you covered to an extent in your rhythm gaming pleasures.
Of course, all the StepMania talk shall belong in the infamous StepMania thread.
Uh, on Beatmap Requests...it definitely depends on the song...but I do have to go through the muck I have right now, so it's best to bear with me there.