Changing your blog design is EASY. Click on dashboard; click on layout; click on pick new template. Choose Minima. (It's the top-left choice.) Save and exit.
Search http://www.thecutestblogontheblock.com/ for the free layout of your choice. Once you find it, copy the code. It says ... copy this code; you can't miss it.
In your blog, click on dashboard; click on layout; click add a gadget. Add the HTML gadget. Paste the code you copied here. Save and exit and your new design has been created.
It's that easy! Let me know if you run into trouble.
*I've learned NOT to change my font color when posting because you can go into the layout tab and change the font on all of your posts with the click of a button. This doesn't work on the ones I manually customized in initial postings. Now I just type in the compose tab and adjust later in the layout tab.