You are not a good judge of you. You are horrible at accurately assessing your capabilities. You have no idea how talented/hard-working/smart/creative you are. This is unfortunate because you are the one who spends the most time with you and if you can’t figure you out, who else possibly can? That’s why you need to just assume that an accurate judgement of your capabilities/talent/work ethic/intelligence/creativity is completely unnecessary. Or if it works better for you, go ahead and assume that you have enough of all of those things to do good work. And  do stuff. Create something. Get it out there in the world so we can see it and feel it and experience it. You’ll find out soon enough whether it’s any good.