Hey Jessica,
I think you’ll be fine and he will support you once the time comes as he won’t want to see you not being able to get about. Tbh that stage only last a few days. By the 4th day you’ll start to become more mobile.
Men will never understand that a woman might just want to do something enhancing just for themselves lol! It’s just an insecurity they have and I think most girls on here have experienced the same in some way or another with their boyfriends or husbands. Once you reassure him (probably a few times) that it’s not to leave him and get another guy he’ll start to feel better and come around.
Plus men like the idea of feeling like men and once you have the op and need to rely on him that little bit more he’ll be secretly loving it!
Best of luck, I’m sure it’ll work out x