Why do you say the fact that you always doubt your ideas and potential is a problem? This is really a good thing, ask yourself a few times every day if you are

Why do you say the fact that you always doubt your ideas and potential is a problem? This is really a good thing, ask yourself a few times every day if you are going in the right direction, and most likely by answering honestly and adjusting your route on your way there you have a bigger chance to complete your journey. You are young and the world doesn't expect from you the knowledge and experience to be confident about anything. There are very few (if any people) who are able to be confident about such things. So just take it easy and believe in yourself. And based on what I've seen, it's the people with no sufficient knowledge and experience who are usually confident. The more you know, the more things out there for you to consider. So, as I said, believe in yourself and never give up.