Thanks for the comments, everyone. I just installed a pre-made layout they have on here. But do you think it's bad if I take that one and completely redo it?
But how I changed mine: I had one of the pre-made layouts and started messing around with the CSS code box thingamajig. I figured it all out really fast by trial-and-error.
Well, first I'll say welcome to Mibba then. <3 You're most definitely not a nobody. D: And what kind of profile are you exactly looking for? There's a ton of awesome sites with pre-made layouts that are incredible. And if you want something specific you can't seem to find, I could try to make it for you. :]