Several little snippets that might help.
Once you are on a blog account, you can create as many blogs as your like, hardest bit will be finding a name that hasn't been taken. Why I mention this is, you might want to have a blog to ''play and mess around with''
Then basically look at the blog as two parts:
Posts: The stuff you upload and your posts you write. The gadgets you add. These all remain static irrespective of any changes in templates & colourways.
Appearance: What it looks like, at first just grab any template & colour scheme that takes your fancy, until you can settle for something permanent (... don't think permanent exists for crafters). How ever many changes of templetes you try, colourways etc. The posts remain static.
When you visit other peoples blogs, look out for the DESIGN type, links to where you can pick up extra templates. But thats in the future.
Good luck & happy blogging.
ps
oooppps meanwhile ^^ see above someone else has been typing.
Hunybunny