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.
When I was a kid I also had hand protectors for roller skates. So if you want to you can even protect that.
Oh yeah forgot about hands lol
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practice falling
I'm not a skater, but I do parkour and I really can't stress this enough.
If you know how to fall it takes away your fear, because you know how to act when it happens. And pro skaters are damn good at falling, even from a parkour perspective.
I ice skated when I was a kid and learning to fall was the first thing they taught us.
Funny thing - forty five years later, if you asked me how to do it, I would have no idea. The technique is completely lost to memory. Except when I actually fall. To this day, I have an unconscious instinct to fail so that i suffer scant little damage whenever I take a spill.