Hi and welcome

I agree with Flatfoot about doing a basic arrangement in 'Band in a Box', I may create several different BiaB arrangements and then open in 'Real Band' to add additional tracks.

I also save files with incremental names. "My Song 01... My Song 02... etc" That way WHEN I screw up and overwrite a good arrangement I can go back to an earlier version.

Real Band has the advantage that you can generate multiple Real Tracks and MIDI tracks of the same Instrument. I will do this with most solo instruments - bass - & keyboards.

Although you can edit them in Real Band, I find it much easier to do in a DAW, where I have access to all my VST instruments and FX. I use Reaper, but any DAW should do the job.

I save the song in all three programs under the same name, so if I need to go back and change something, it's not to big a deal.

Eventually you'll find a way that works best for you.

Boyd
Win10 - 16GB-RAM - BiaB 2019 - Mixbus 4 - Slate Bundle - Komplete 10 - Ozone 8 - Neutron 2 - Waves Gold
Ample Sound Guitars & Basses - Pianoteq 6 - SSD5 - SD3 - JamStix 4 - Omnisphere - UVI Falcon - EastWest Play
Sonarworks Reference 4 -