is it smart to wait until after srs?

I've always been super uncomfortable with my body in sexual situations, plus my sex drive has always been rly low, so I've never actually had sex, and anal just isn't rly my thing, I find it quite humiliating even tho it's quite pleasant (I have some experience). so that's why I would maybe want to wait until I'm post op to finally have that experience with a guy. the only thing I'm worried about is my srs not going well, and that I'll either be too tight or not have enough depth for him to enjoy it, or he'd be disgusted by the way it looks. is it a good idea to wait to have my first time after srs?