CMS Made Simple Forums

I have just dived into CMS Made simple, and I am using the NCleanBlue template.
At the front page there is only the News box and the main content box.

Are any of you able to explain for me how I can easily add 1 or 2 more boxes under the main content box?

In your template insert anywhere you like:
{content block="Name_of_block"}
"Name_of_block" would be the name you give the block.

For more options to content blocks just read the help section in Extensions/Tags -> Content

Everything you want to know is there.