This was me up until recently.
My advice: get a board and just go try it.
So much of basic skateboarding is just building confidence on flat ground. It’s hard to hurt yourself when you’re like 2 inches off the ground, at worst I’ve gotten some scraped knees and palms.
This guy’s videos are down to earth if you want some quick motivation:
Also it might look goofy, but just get some basic knee and elbow protectors and a decent helmet. Those are the only areas you easily hurt as long as you are on flat ground with no obstacles.
If you’re afraid of falling, wear protectors and just deliberately fall a couple of times to test the level of protection and practice falling to build confidence.
I’m bad at sports and use skating to exercise, so I suck and regularly fall ~3 times per hour, but it’s not a big deal at all and rarely hurts. And over time you really learn how to fall in a more controlled fashion, which is a useful skill to have by itself - it’s prevented me from getting injured when I tripped and fell on a hike.
Start slow. A skateboard is like an inch off the ground, in the worst case you can always jump off. Practice jumping off when standing, when rolling slowly and just start to build up confidence like that.