I had a total left hip replacement 14 weeks ago. I had to have it due to AVN, loss of bloody supply and subsequent necrosis of the femur head. This is commonly caused when the vein gets damaged during a fracture/break nr the femur head. This would have been what they were trying to avoid for you - having lived with it for 3 years, I can tell you you've done the right thing. Hip replacements last a super long time now too. Uncertain what caused mine.
As a point of reference I had a posterior approach procedure. I chose this on the advice of my surgeon. I was sent home with no movement restrictions and have been fine without raised seating/bed etc.
I got so much conflicting reports when I looked into recovery times, rehab principles and how to reintroduce training. I think every situation is different but I've tried to give a quick overview of my last 4 months as reference.
The first 2 weeks I focussed completely on recovery, eating really well, resting as much as I could, and physio 2-4 times a day. I didn't sleep great - discomfort from the hip and spacey from pain meds. Physio felt awkward and uncomfortable. This did improve over time. 3x short walks a day building up from 5mins - 30mins. I was off crutches pretty quickly. Def by end of 2nd week.
Diet isn't to be overlooked IMO. I eat a low-GI diet anyway but I fiddled it to make sure it was really low GI and kept carb intake low and the inflammation around the op site disappeared really quickly - obviously swelling at the incision remained.
My surgeon told me I'd be back on the turbo after 2 weeks and I didn't believe him. He was right. I started doing 30min sessions with no resistance after 2.5 weeks and started to rebuild.
I did 4/5 weeks of base work. Keeping the muscles active, base cardio and keeping my legs moving for long periods of time. By this point I could take the dog out for 2 hours of hill walking. Needed to rest the hip after a walk but no pain.
From there it's just got better and better. I am better than I was pre-op in many ways.
I think the key things for me were diet, keeping as much movement in the day between rest periods as possible, and physio - abduction work, S&C and don't ignore your core. I'm a sucker for routine too so I still got up with my partner and prepped lunch whilst she was working and stuff, I also after about 2 weeks let myself enjoy the forced recovery and time away from work. Have fun with it. I found that a high energy/active day could be followed by a tired/sore day and I slowly got used to it and let go of continually trying to improve on my physio or whatever little goal Id set for myself.
Goals is a good one too. Sadly this wasn't my first rodeo with surgeries, but I've always found that having little achievable goals post-op keeps me feeling like I'm progressing and have a little bit of control over the situation, can be simple shit like, I'm going to make all the coffees today or whatever. Just having to get up multiple times, stand up, balance whilst, moving around the kitchen can be properly tiring but keeps you moving and helps immensely.
I wrote more than I planned. Let me know if you have any specific questions, or feel free to get in touch etc. Hope it's a smooth recovery mate!