There are hundreds of places to get forum software. Literally: HUNDREDS. PS2Fantasy uses a software called
vBulletin, but it is not free. I think the owned license is $160. You can also download
Invision Board, which is free software. XMB is another one, and YaBB is good as well.
Now, you do have to know a small amount of MySQL knowledge to get your forum working. You will need to be able to modify PHP files (If you go with Invision Board, or vBulletin, or YaBB), and you have to know how to create a MySQL database, and add a database user to it.