It took me a long time to understand that investing is not about being right.
It's about not getting burned too badly in the moments when I'm not. I might have 10 great ideas, but one oversized position without proper risk management can wipe out either all or a significant part of the portfolio. And I've experienced that too.
The beginnings were difficult. Gradually, as I started to educate myself more and more, I changed and adapted my overall plan and investment, or trading strategy, so that it suited me and I could sleep soundly.
That's what it's all about, really.