Changing the Theme

I need to change the look of my blog. It is so BORING. I'm uneasy about doing this.  I don't want to make a newbie mistake and erase the whole thing.  Guess I need to do a back up, huh.  Only I'm not REALLY sure  how.  Need to go back and read Mel's instructions again.  Truly don't have time this morning to get finish before I need to leave at 11:45. 

But I'll think about (obsess) over it all day.