if you dont know much about html, i wouldn't worry changing it too much. Your best bet is to choose one of the premade drunkduck templates. It will save you a lot of trouble in the long run.
However, if you are feeling up for a challenge, you can find a few user created templates (in this subforum) that you can experiment with. HTML itself is kinda frustrating at first but you can learn basic color codes from a lot online resources. I recommend http://www.lissaexplains.com/