I use 13" MacBook laptop. Song list folder is set up ahead of time and played in jukebox mode so songs load automatically. I shrink BIAB to the right 3/4 of the screen and have lyrics, which are in a separate folder, stacked in order on the left 1/4 of the screen.
Jazzmandan is correct as to sound.
I have a choice of 3 PA options to select from depending upon the size room/audience.