Use h2 for Categories on Home Page

[LJsLifestyle]

Hi

I'm sure this is dead simple to someone totally versed in code, but I know just enough to make me dangerous.

I'm trying to do some specific SEO to my home page, and would like to change the category headings (top right, top left and bottom) to an h2 tag. I know what to do in my home.php and I know I need to add to my stylesheet. I'm just not sure if I need to create an div ID or div class and if I need to just add it once or to each homepageleft, right and bottom.

I'm using the #content h2 on individual posts, so I need a new div. One that looks exactly like the h3 used now on the home page is fine.

Hopefully, that made sense. If not, please let me know!

Oh, and I have 4.0

Thanks in advance...
LJ