Investing is a learning process just like everything else. You can't do everything right, right away. You will make mistakes. That's a given. But that's okay. Don't beat yourself up over it. I did. And it didn't help. And the stupidest thing is I didn't even lose money I invested, I just didn't sell at the highest point. You can make yourself go crazy thinking what if what if what if. Or I should have done this or that. But the fact is you couldn't have known. You did what you thought was the best decision with the knowledge you had at that moment.