BuddyPress.org

Hi. I am trying to create a private forum where those in my field can communicate. I am using the default buddypress theme but am completely confused with the setup. I’m looking to make this as simple and easy to use as possible. This can be found at chiroonthego.com. As you can see I haven’t gotten very far. Can anyone suggest a tutorial that makes some sense of this please? I just want a central forum that may be divided up into categories and the ability for member to create profiles.Thank you