Need help with my blog...

I'm trying to update the backgrounds on my blog, and I don't know if I made it better or not. It's very pink. How do you all get more screen space taken up? I'd like to make my comment area larger (wider) and widen my sidebar, too. Also, how do you post more than one pic, with comments in between? I can't figure that out either! Andrea (who is feeling tech-stupid today and has many other things to be doing besides messing around on Blogger - oh, well)