A quick comment Harry about internet security. Never, ever post your correct email address in an open forum. All kinds of 'bots see that and in a matter of oh, 30 seconds or so, your email inbox starts filling up with all kinds of "interesting" stuff. If you need to post an email address spell out the @ as "at" and the .com as "dot com". Real humans can figure that out but it usually fools the 'bots.
As to you learning the program, it's helpful when you have a question to include your system information such as os, processor, memory, what you're using for sound, how you have Biab set up in the midi/audio config screens, etc.
For what you asked about, my suggestion is to work with Real Band at the same time as you're learning Biab. If you're basic "pro" package doesn't include RB, there's another reason to go for the upgrade package. RB will do what you want and since the two programs are related most of what you learn in Biab applies to RB as well except that RB does a whole lot more than Biab alone can.

Bob

Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.