Very good. Take heart, you'll get past most of this. And there will be some things BIAB cannot do, or cannot do easily. For those, audio editing may be the best solution.

BIAB has a limit of 255 measures. Whatever you don't use in the Chordsheet View is still there, grayed out.

BIAB has, in the Song Settings (Ctrl+N) a checkbox that adds a two-bar ending. I think that's the original default value. It's better in many cases to turn that off and roll your own. In your song, set that Bar at End of Chorus to 142 or thereabouts, so the sound has a chance to decay, and it doesn't overwrite your last measures of chords with the auto-generated ending. The Bar for End of Chorus is useful when the song has repeats, but in your case, the number of choruses is 1 and there are no repeats. A lot of users here (not all, not me, but it's fine) prefer to lay out all songs that way. Again, it's roll your own when needed.

At this point, may I recommend you make separate threads for each specific question. Then we can knock them off one by one. This thread is already pretty complex.

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.