Hi rd151
Welcome to the forums.
Lots of useful info here and experienced people always willing to help.

Sometimes the learning curves can be frustrating with any new programs and these forums along with the excellent PG Music support staff can solve pretty much any problem you might have.

I like to suggest to newbies to check out "Song from start to finish - BIAB, RealBand, & Reaper" videos located here:
http://www.pgmusic.com/videos.user.htm

It will give you a good overall view of some of the capabilities of BIAB in conjunction with RB and their use with other DAW's, in this case, Reaper, to bring your musical ideas to reality.

Best wishes,
Carkins