Hi Hank Hope you are well.
Firstly I will post this

https://www.reaper.fm/videos.php
Kenny G the guy on the video is amazing at explaining things,way better than probably anyone .
Having said that heres a little help
If you want to edit ur tracks in anyway you can use Realband or you can drag ur track over to reaper from biab or realband.You can do this individually or in a group,
When you open reaper its intial state has no track loaded so it looks blank.When you drag the tracks over they will create a track for you or you can load tracks from the menu at the top called "track"
When ur track is in reaper u will see the track control panel on the left of the page.With this control panel you can do all sorts of things ,mute,put effects on,turn up volume ,pan etc
Kenny G is the man have a look at his videos but I find Reaper to be a great Digital Audio Workstation urs Hugh