Tips on pretending not to be baby repulsed?

A family member has a newborn and I want to visit them as a show of support, and to catch up since it’s been a while. However, I am really, really repulsed by babies and small children; I don’t know why, something about it makes my skin crawl. Usually, if I’m in a situation where there is a baby, it’s not by choice so I feel justified in appearing disinterested. I feel like in this context, though, want to put my own comfort aside, just for less than one day, but I don’t know how to mask that.

Does anyone have advice on what’s normal/polite to say around babies? Growing up I was never around any, and I also have social anxiety so the social “scripts” that come naturally to others just… don’t to me.

Would appreciate literally any advice, even if it’s just the most obvious shit you’d never think a person would need to be told to do.

Edit: Thanks for the advice everyone! It’s really been so much help, the visit went super smoothly. There was a discussion around people being scared to hold the baby since they weren’t used to holding them, so when I was offered the chance I declined and said I didn’t feel safe doing so. No hard feelings!

Tips on pretending not to be baby repulsed?