Redecorating?

Now that I am feeling a little more comfortable with my writing, and with how to post things like links and stuff, I would love some tips on how to freshen and brighten up my Blog. I really don't like the black background . I don't even know why I chose this template. I am afraid of losing all my stuff on my blog if I change my template. If anyone has any suggestions and could help walk me through the changes I would greatly appreciate it!