I always hear people saying that they really want to do something, but they are too uncertain in their skills or knowledge, too scared of other people's reactions or even (and most often) unconfident about themselves. A few examples (I'm pretty sure you know what I'm talking about):

To be honest, I'm one of those people who are always unsure. I start doing something when I feel extremely inspired and once I made a mistake and messed up, I feel like "It's not mine; I can't; I won't do it ever again!" It happens all the time - it doesn't matter if it's about cooking, painting, handmade or something else that I'm a newbie or not good at.

But here's something that my mum keeps telling me and that I'm trying to learn and spread to other people: you can't be successful at anything from the first try. You won't paint like a great artist/you can't cook like a chef/you can't photograph like a pro/you won't be a genius writer/you can't sing perfectly if you've never done it and you have no experience.
Actually, people born with a natural gift of something are extremely rare. Great artists, scientists or writers wouldn't be so great without studying, practicing and getting any kind of experience.
And it's okay if you can't do something from the first, second or even tenth try! But if you'll never try, you'll never know how good you could be!