HTML & CSS on SpaceHey?

I'm currently working on my own website and I know the tinest bit of HTML & CSS because of that. However, if someone could give me some tips on how to use that knowledge on this site, that'd be greatly appreciated! :P

If you're curious, here's my website: Obsessive Haven - it's a massive WIP but my Mr.Kitty Fanpage is pretty much done. I love his music so much. Gotta get my hands on a CD or something. XwX

Love to you & stay determined! <3