Absolutely, could not say it better….. you learn more from failures than successes (Kevin Costner, Dances with Wolves..)Lots of mistakes to avoid but realistically you have to experience them to learn why they are mistakes. You can’t always shortcut the learning curve.
So the top mistake I’d say is giving up too quickly. Second one is related: not trying things and seeing what happens because you never know when serendipity strikes. Last one on my list is believing you have to do photography the same way as someone else.