I think fundamentally, it’s about what kind of person you want to be, psychologically.

There is no problem with a self image that’s not “puritan” and then the actions that reflect that. If you think of yourself as having a style and attitude and projecting and communicating that, aggressively, it’s fine to be who you want to be. E.g. punks dressing as punks, “expensive brand stuff”, or tattoos or plastic surgery.

Being about your attitude towards other people can also just be “you”. So I wouldn’t worry about doing it for yourself or doing it for “other people”.

I would make 100% sure to talk about it with your husband, this is a thing you definitely don’t want to backfire. Maybe be dislikes the idea of plastic surgery more than he would like the new shape.

By contrast, if you work in a public service job, or in a big office and there is competition and how you dress is part of office politics and competition and the difference between getting clients to sign or not, that is where I would say you’re dressing for other people. Same if you’re in a punk band and worried about not being “punk enough” and getting piercings or whatever because of that, to fit in and not necessarily because you like the idea of piercings.

I generally don’t think modifying your own body is a good idea, and it’s unnecessary. The whole “if someone demands to be impressed, they are not worth impressing” thing.

But it is your body, do what you want.

Also inform yourself about the medical side of things, as mentioned by others.

I wish you happiness with your decision either way.