New possible project advice sought

Hello. Not sure if this is the best place to ask this question. But I will give it a go. I want to create a web page that operates in very similar ways to the plugin pages. Im not doing plugins but I want to have an About tab and a support forum unique for a specific user. Therefore many users having individual page and forum. The star rating and highlighting the individual as the "author" on that page would also be nice. Graphically a banner accross the top too would be good.

Im more worried about how to make the multiple users having individual forums on sepate pages. This needs to be flexible to add many many as the database grows.

Any advice greatly appreciated in a direction to approach this.