I think you soon will be doing more and longer walks per day.
Moving from 2 to 1 crutch will be a natural step. The second crutch eventually becomes a nuisance for certain things (opening a door, grabbing something...) and soon after you'll just use both when you go outside, then eventually put it away completely.
It's key to focus on the proper gait (1-2, 1-2, ...), try to not lean over the non operated side, get used to look ahead again rather than down to your feet, and do not rush to discard walking aids or to walk faster.
I'm just 1 month post op today and still using 1 crutch, although I can manage without it inside the house. It wasn't premeditated, just happened naturally.
I never walked with pain, at most felt some stiffness (at the start or towards the end of a session) and soreness in some muscles.
I'm sure they gave you some strict rules about DON'Ts for the first 6 weeks or so (no hip flexion more than 90 degrees, do not cross over legs, things like that), it's key not to break those rules. And guidelines about when to start some light, no impact sporting activity, and when impact activities can be resumed.
Regarding exercises, every surgeon will have their own view. I'm just doing the exercises the physio showed me during the week post operation, the physio was sent by my doctor. You need to ask you surgeon.