Transitioning to cows milk

So I’m super confused on the whole transitioning to milk thing. Normally he has a 6 Oz bottle of formula when he wakes up in the morning, after his naps and before bed along with 2-3 meals a day. He doesn’t have a problem with cows milk I’ve let him try it before and he loved it so I’m not worried about weaning him off the formula. But I’m confused on how often I give it to him. Do I still give him 6 Oz every time he wakes up and before bed or should the meals be replacing it? Do I just give him a bottle with his meals? And should I also be giving him water too?