Re: Some noob questions :)
Hi Junaid,
I did the same thing our Tiki site and I found that proper planning goes a long way with categories. I'd suggest sitting down and mapping out all your categories before you start creating them.
Also, it's much easier to work with a lot of categories from a permission standpoint. I have lots of categories that only have one or two pages/articles/whatever underneath them. It might seem inefficient to some, but it makes managing them much easier.