Yeah, I've been noticing a lot of "Newbie's" trying to run leagues, and some "non-newbies." The problem is, nothing is professional. I know it's a video game but if you're going to do something like host a league than you have to be professional, and take its seriously. Like Nick said, "Do you have a rulebook, schedule, points system or anything pertaining to the success of the league already done?" If you do, then, by all means, GO FOR IT! Otherwise, stay away from trying to run a league.
I hosted a Fun-Run that wasn't too bad, but I got the job done. I had brackets, a private server, other officials, and etc. Before the Fun-Run I started brainstorming a league, but after the event I backed out. Simply because there's more to a league than there is to a "mini-comp" or Fun-Run.
Sorry if this didn't make much sense I can hardly comprehend what I just read, lol.