[kh99]

As someone mentioned above, we can't tell you how to add it to your main page without more information (ideally a link to your main page).

The problem with including it in a post is that you normally can't put html in a post (and it's not a good idea to enable html). What you could do it create a new bbcode and put that html as the replacement, then you can use the bbcode in a post.

If you're worried about experimenting with inserting the code in templates, you could create a new style and use that to experiment, then if it gets messed up just delete it (you just need to be careful when you're editing template to make sure it's a template in your experimental style).