I'm still pre-op but I can tell you that I have designated days for different parts of my body. I tend to hit my chest two days a week because it's progressively getting more pec-ish and hopefully soon I'll be able to go without a binder. The exercises I do are based on pyramid sets, meaning I start with a lighter weight and move up each set. Here's my chest workout:
Incline dumbell flies: 10 reps for 3 sets
1 minute rest
10 Diamond pushups
3 minute rest
Incline dumbell press: 10 reps for 3 sets
1 minute rest
Flatbench dumbell press: 10 reps for 3 set
Five minute rest and then barbell press: to failure
Also: Eat more protein and get as much sleep as possible. Working out doesn't build the muscle, it tears it and breaks it down. Muscle building actually happens in your sleep when your body is healing itself.