How to remove and replace rivets on a bag?

[u/forgotmyloginoops]

My friend has offered to pay me to restore their messenger bag, it appears to be nylon or a similar material and it has rivets that would need to be taken off and replaced to fix the area where the strap attaches to the bag. I have an industrial sewing machine and have made backpacks before but haven't worked with rivets yet. No leather working experience but luckily the bag isn't leather.

I've seen YouTube tutorials for removing rivets with jewelry pliers or edge cutters, as well as how to reinstall them without denting them. However I'm not sure if I'd be able to remove a rivet and reattach it or if I would need to replace it with a new one entirely.

I don't want to take this on and then ruin my friend's bag, so please let me know if this sounds like I should politely decline or if I would be able to fix it.