You do not have to be a certain age to join a forum; however, some forums with more mature content may require you to over a certain age. For example, if there is some mature content, they will ask...
The best way to get people on a forum is advertise, depending on what forum software you use and what website host you have, you could already be on Google. Using vBulletin increases your chance of...
That can be a difficult task, one way is to include the forum URL in your signature, for example your e-mail signature. When you send a e-mail to your friends they will see the url, and if they are...