The best way to learn how to use this site is to be daring and experiment, but here is some information that might help:
(You can use Google to find an answer to your question. Include in your search the word “Buddypress,” as this is the software used to implement this site.)
Your profile – click on your own username to edit information about you. Upload your own picture (avatar) if you like.
Your activity – click on your own username and write something in the box that says, “What’s new, … “. This is your personal activity stream. You are sharing this information with everyone. Anyone can add comments.
Forums – Take part in a discussion. Any number of forums dedicated to a particular subject may exist. Only the administrator can create forums; however, each forum is subdivided into topics, and you can create a new topic if you like. (Try to be sure the topic doesn’t already exist.) Forum activity also shows up in the activity stream. If a forum is empty, you must create a topic before you can comment.
All Activity Streams – Click this main menu item to a combined view of all activity streams, including personal streams. You can comment on any stream if you like.