Given my somewhat meandering journey through the world of commerce, I usually hesitate to offer advice, but one thing I always tell people who are nervous to start their own thing (or charge properly when they do): the thing you find easy & obvious someone else finds impossible.
I'm 42 but I still have plenty of visits from that old friend, Imposter Syndrome. It's probably easier being less sensitive and not having such attacks, but I am built the way I am. That makes doing my own thing harder some days but it's never not worth it.
So, for you other sensitive peeps out there: the thing you're good at, that you have spent thousands of hours thinking about, that is completely integrated into your world - that's a thing that someone else finds mysterious, terrifying or so boring they want to die.
The whole point of commerce is to connect people who struggle to do something with people who don't, and vice versa. It's ok to be a terrible plumber but a good animator and vice versa. That's the truly marvellous thing about human industry. Embrace it, don't doubt it.