A lot of people want to create something. A lot do, but even more stop themselves. Why? One reason, fear that it won't be any good. That one doesn't make too much sense, because the thing you're doing probably won't be good right away. That is just a given. It's supposed to be bad. But should you not do it for that reason? No. If everyone did that, we'd have nothing. We probably wouldn't even have chairs.
"I'm thinking of building this thing for people to sit on. I don't know, though. It might not work."
"Yeah. don't even bother."
"You're right. I don't want to make something that breaks. Or worse, something that NO ONE uses. Let's go do nothing ever and not try."
People who create things have doubts about it as well, but they still put in the effort to do it.
Some people stop themselves out of fear about how what they are creating will be perceived. Just put out what you want to put out. At some point I'm sure people told George Lucas that Star Wars sounded like an awful idea. There might have even been a point where it sounded dumb to him.
"What the hell was that thought I just had? A guy with a microwave on his chest is the father of some other wiener? And there's a big ape thing, and some weird robots that have a very strange relationship to each other? Am I going crazy?! People are not gonna want to see this! Well, I'll write it anyway and see what happens."
You just do it. You just start doing it. The people you've created in your head who may or may not like this probably don't exist. Who are they? Who are these people that are waiting for you to create something that they can destroy? You're probably making them up!
"People are going to hate this thing I want to make."
"What people? Where?"
"The people! The people out there! The people that also have doubts about their own lives! They're gonna hate me!"
Seems to be the difference between people who create and people who don't is trying. Just trying and doing. The difference between an author and someone who wants to write a book, is that the author did. That's really it. They started and kept writing. Were the first things they wrote good? Probably not. But they kept doing it, and now they have a book or books. They tried. If you are someone who wants to write books and doesn't, are the people who do some sort of mystic creatures who have a power to churn out a book without thinking about it? Could be true. More realistically they work at it a ton. Either way, no matter how they do what they do, it doesn't mean that you shouldn't do what you want to do.
People also hold themselves back by comparing themselves to others. By looking at what another human has, wanting it, and for some reason thinking that person is either more deserving, or because they have it you can never have it or do it or be it.
"Ah, god. Look. That person has exactly what I want with my life. And they have it NOW. I'll never have it."
"Um, duh. Because THEY have it. How can TWO people both be video game developers in that company at the same time?"
"They have hundreds of developers."
"Geez, way to make me feel worse!"
It doesn't matter what other people are doing. Other people being successful does not mean that you can't be. Thinking that's true is just holding yourself back.
There are many ways one can hold themselves back. Not thinking they're worthy. Not thinking they are talented/beautiful/smart enough. Whatever the case may be. But you have to fight that.
"I can't do what? Suck me, brain! I'm doing it!"
'Suck me, brain!' is not for everybody. You can come up with your own phrase. May I suggest 'blow me, bud'? Or, 'Yo, go down on me, frontal lobe!'? Whichever one you feel comfortable with. Don't hold yourself back!