I had my HR done almost 3 months ago, at age 46 like you.
Regarding walking, at 24h post-surgery I was encouraged to use the crutches while still at the hospital. A couple of days later I could walk 100m or so, within 1 week around 1km in one go (slow and ugly). After 1 week I needed one crutch only, but kept using both while walking outside for another 2 weeks until I felt stronger and confident that a small stumble wouldn't bring me down. Also, with 2 crutches, passers by on the street seem to give you a bit more room and respect! Between weeks 4 and 6 used just one, and I could walk up to 10km per day, typically 6-8km in 2-3 walks. Probably that's too much for some, but I never walked in pain or had issues after the routine. Then at week 7 gradually got rid of the remaining crutch, only when I wasn't limping anymore.
Regarding mobility, it wasn't easy to sit down (particularly in the toilet) the first 10 days or so, but things improved (slowly, gradually) all the time. I used the toilet riser for 6 weeks (to not break the 90 degree rule, but I needed it anyway).
Given the usual mandatory restrictions that normally apply for 6 weeks or more (no crossing legs, no flexion over 90 degrees etc), you feel limited, but still can do most things by yourself. In any case don't try to be a hero.
Putting on your socks and shoes you can't do at first (and you shouldn't), the sock aid helps but is not easy. I managed after 3 weeks or so to do this by myself most of the time, by bringing my foot/heel to the back of the leg and reach the toes from behind (and slightly lateral, but there is also a restriction about bending laterally, so must be careful and if you don't reach, don't try), while the heel is resting against the edge of the bed or a chair.
About the compression socks, which I was asked to use for 3 weeks, I needed help to put them and take them off every time.
In and out of bed was also difficult, the first few days I needed help sometimes to bring the operated leg up to the bed (although in theory you can carry it with the other leg, pushing from underneath), getting out was easier.
While in bed, I couldn't move much (the first 4-5 days I wouldn't even try to turn to the good side), so lied on my back. Then, with a pillow between legs, I could gradually get used to be on the good side. Lying on the operated leg is still not comfortable now, so I don't do it.
Getting in a car I found very difficult for 2-3 weeks, even if you retract the seat as much as possible. Getting out of the car was easier.
I could shower on my own within 2 days (walk-in shower), and able to get in/out of a bath tube at 10 days (there are some guidelines on how to do that), but I used flip-flops in the shower for 6-7 weeks to avoid slipping, and also made sure I had a hand support at all times.
So normal things (those that you don't even think of now) will not be straightforward initially (and some impossible), but still you will manage with patience, being cautious and with a little bit of help. And soon you'll see improvements.