The thing is, OP, what other people tell you about the effect pregnancy had on their bodies isn't all that relevant to you.
You just can't know how pregnancy will affect YOUR body.
My friend had two uncomplicated vaginal births and then her third child ended up being born by crash C-section and she told me her tummy was "ruined" afterwards. Admittedly that was only a few weeks afterwards so she may feel differently now, but I haven't asked.
Another friend had really bad SPD during her pregnancy and was on crutches for the last few months. She also haemorrhaged quite badly during the birth. She doesn't want any more children.
Another friend had hyperemesis gravidarum during all of her pregnancies. It sounds like pregnancy was pretty miserable for her but she still had three children, straightforward vaginal births each time, and never put on much weight other than the baby during pregnancy. She was very fit before and is very fit again now, but apparently her pelvic floor isn't what it was.
Another friend had some condition where her baby basically leached all the calcium from her bones during pregnancy and she only found out several months postpartum when she fell off her bike and shattered her hip. She also doesn't want more children.
Another friend had fairly straightforward pregnancies and births with her two children but says her body isn't what it was. Outwardly, when fully clothed, she looks pretty much the same to me as she did before. But recently I was with her in the kitchen when she reached up to get something off a high shelf, her jumper lifted up a few inches and I saw that her tummy was absolutely covered in stretch marks.
Me personally, I have an unscathed vagina due to having an emergency C-section with my first child, and a neat 10cm scar which has healed well. It's not completely flat, but I never lost the last half stone between pregnancies. I certainly don't have a "shelf" or an "overhang". Maybe if I had lost more weight and if I'd bothered to do toning exercises, it would have gone completely flat. I'm now 8 months pregnant again and not even bothering to think about this stuff for at least another 6 months. So far I still have no stretch marks. If I have a vaginal birth this time, my C-section scar should hopefully stay as neat and unobtrusive as it is, and nobody is ever likely to see it other than me, my husband and my doctors. But I might have vaginal tearing or pelvic floor damage. If I have another C-section, my vagina will still be unscathed, but I don't know how my abdomen will look. Maybe the doctor will be able to cut into the same incision as last time and make my new scar look as neat as the current one. Maybe they won't. I'll just have to wait and see.
It's worth bearing in mind that all the friends I have mentioned above look pretty much the same as they did before when fully clothed, which is how most people will see you unless you happen to be a swinger or a bikini model. The things they are unhappy about with their postpartum bodies are generally things only they and their partners can see. If you're worried about how other people will perceive your post baby body, don't. No one cares. And the chances are you will be able to recover to an extent that the people around you can't tell the difference. If you're more worried about your own feelings about your post baby body, that's something you will have to work on anyway.
Even if you never carry a pregnancy to term and give birth, your body will age. You will gain weight, you will get wrinkles, your skin will dry out and start to sag, parts of your body will stop working as well as they once did. And that's OK. The only alternative to ageing is dying when you're young and beautiful, which I assume you don't want to do.
So if I were you I would approach pregnancy and ageing in the same way. Try to look after yourself as best you can. You only get one body, so take care of it. Exercise, eat well, stay a healthy weight, drink plenty of water, don't do things which are harmful to your body, take care of your skin, hair and nails, wear sunscreen, all that stuff. But also accept that your body will change, and that's life.
If you want a baby, don't let this put you off having one. You will change, and that's OK.