Everybody is different, and the damage fixed usually also varies, which is why some of us have 100% loading from the start (I did) and others have less.
The best thing is to follow your surgeon's instructions and go from there. Other people have different situations. The goal is that in the end you get to where you want to be: healthy.
If you don't have lingering pain / problems, you should be ok, especially after having gotten a hold of your surgeon.
I also didn't have a walk in shower, but had an occupational therapist at work who taught me the best way to get in and out of the shower without a hassle. This was important since I lived by myself. Maybe it would help to get a hold of one?
Unfortunately I'm not sure if insurance would cover the therapists since the Doctor did not require one.
And that's pretty wild that some people can walk around no big deal and others are stuck to a bed for weeks. My first surgery was a lot worse than this one is so far.
If you want it and it would help, I'd just talk to the surgeon and ask if he or she would advise it.
As to walking around, we all had different amounts of damage. I had a long stretch of degeneration, but dense bones from a whole lot of weight lifting and martial arts. Other folks here would be better off than I due to genetics or activity, some worse.
All in all, it's not how quickly you get back to life, but how well. It's a long stretch and rushing it is not a great idea. Like the great disco philosopher, Leon Haywood notes... "Don't push it, don't force it, let it happen naturally... "