What form is your "performance repertoire" going to be? BIAB files you play along with in BIAB? Logic Pro files you play along with in Logic? mp3 or audio files that you play along with elsewhere?

You do not import "midi instruments", you import midi data. This data tells a synthesizer such things as what note to play, how long to play it, what tempo to play at, etc. So if you took midi data from Logic and played it in BIAB, it will play with whatever synthesizer is assigned to play it in BIAB. So you would hear the same midi data played on a different synth. I know this is all confusing, but stick with it! You'll eventually get it all figured out!

As far as repeating choruses, you can also endlessly loop a segment within Logic, but it would be the exact same thing repeated over and over, NOT with variations as you would get in BIAB. If you are totally new to all of this, I might suggest to just stick with BIAB first. Then later, when you've got a little better understanding of BIAB (and computer audio in general), then you could try to incorporate Logic. Otherwise, you're trying to learn two really complicated programs PLUS some general computer audio principles ALL at once, which is a daunting task.

Good luck! Have fun! Enjoy the ride! Don't hesitate to ask questions - you'll usually find a pretty congenial response here!

Bruce

Macbook Pro 2018
2.6 GHz 6-core Intel Core i7, 16 GB RAM
OS Monterey
BIAB for Mac 2022