I found a lot of "do's" and "don't's" on the wall of my al-anon meetings.
DON'T: nag, count drinks, bargain, supervise, pay his bills, etc.
DO: Focus on One Day at a Time for what makes you happy. Be honest.
Those are the basics.
My suggestion to you for a lifetime of learning is to attend Al-anon. You'll learn life skills that are applicable to all your relationships and place in this world.