If I Was To...

...ask an admin to perform an Admin task for me (nothing even remotely bad) who should I ask?

Depends on what.

With Invisionfree forums, you can't sign up with less than 3 letters. However, if you access the AdminCP, you can restrict it to 2 if you want.

That's what I'd like an admin to do for me if they don't mind...

I've logged about three hours in the ACP already today, so why not? I'll edit your name afterwards.

Don't have to. I just prefer that name.