The key thing to understand is that your mind is going to tell you all kinds of stuff like, it's not enough, but that's ok. It doesn't need to be enough. And so the person who recognizes that this is a battle that'll have to fight every single day is the one that actually wins. So adopt a present focus. Focus on things that you can accomplish within 15 minutes. In 30 minutes, i'm going to do one pomidoro of studying. The rest of the next ten hours, i can worry about how it's not going to be enough,. I don't need to panic for 12 hours a day. Ten hours of a day is sufficient.