At the start, the coin flip winner can get the first break, but the other guy gets to choose whether you start out with 8 or 9 ball.
After 5 games of 8 ball you switch to 9 no matter what happened in those games. Ditto after 8 games of 9 ball. But since it's a race to 7, if you get demolished in 9 ball you may never get a chance to play 8.
No coach no handicaps, jump cues legal, push out is allowed, but no 3-foul. Still dumb rules: Slop counts in 8 and 9, except I think the 8 in 8-ball. Take what you make in 8 ball.
There's no instruction that I saw, though some of the guys are pretty cool and would probably give you some help if asked..