1. How to add a new topic. Just click a certain section, General Discussion for example, click new topic. Type in your topic and click send.
2. How to edit your profile. Click Profile, there you can edit many things including the profile people see when they click on you in the members section, you can change/edit your avatar by clicking avatar in your profile settings, then upload an image from your computer by clicking Choose File. Also you can change/ Edit your signature by going to your profile settings and clicking signature.
3. Adding Friends. You can add someone to your friends or foes list by clicking their profile in the members section and clicking the add to friends list or add to foes list in the upper right corner of their profile.