Web Server Hosting

I am looking to build a website. I am definitely a learn as I go kind of person but do need a little help here and there. I am looking for a server that will allow me to have a forum and a user log in for vistors to be able to post pictures, [...]

I’m Sorry i wasn’t clear. I’m looking to possibly start a web hosting service and would like to know what type of server is generaly used in the bussiness. Size, speed, and operating systems any info that might help. Thank You