BuddyPress.org

found some answers to my questions which helped out a lot…

how do i create a tab for this blog?

i did this in the settings where i could make my blog a tab (static page) rather than being the home tab. this was what i wanted to do. now my home page is static and i have a tab for my blog.

how do i let my users create their own blog?

using WPMU which i am not going to do. i am more content with WP at this time after looking more into wpmu