Want to get a vb
 

I am very interested in purchasing a vb forum and currently run one on proboards that just doesnt look that good (proffesional) my main question is how easily will I be able to creat my new forum if I am not very experienced with PHP?

Depends on how experienced you are at managing forums in general.
I'd suggest reading the vBulletin manual first.

I currently manage a forum with over 1200 members but it is on proboards which i am very familiar with I just don't like it because it feels cheap to me and I really like the way vb looks. I was mostly wondering about adding new catagories thread etc. etc. and how much learning will I have to do.???

vBulletin already comes with a lot of standard features that not all of the other boards have. If you can do with the out of the box features, you don't need any php knowledge at all. It is just uploading the files, run the installer and make your setting in your AdminCP.

In your case you would probably also need to convert your current board. For this you can get a free tool ImpEx from the member download at Jelsoft.

If you want to improve your board by installing some hacks, most come with good instructions. No php knowledge needed, just comon sense and a helpfull community.

I dont know what you mean with the category question, so i can't answer on that, please explain more.