how to change your Blogger theme to another Basic Blogger theme in just 3 steps.
What I'am talking about is the default theme that blogger provided to you.
So this is just the Basic, there are no XML or any other HTML knowledge required Just Follow this steps In Changing Blogger theme (Basic)
Step 1: Go to Blogger>Layout>Pick New Template
Step 2: Pick your Desired Template.
Step 3: Click "Save"
So if your not satisfied in Blogger Basic Theme you can Go Advance.
Check out this post:
How to Install a Blogger XML template.
Where can I Download Blogger XML Templates.