In school you get taught an awful lot of rubbish. And at the end, you're judged on the ability to remember useless facts.

The biggest life skill in my eyes? How well you can communicate with strangers, how fast you can build rapport with different personality types. Communication is so important, as only a certain percentage of what we're saying is usually received by the other person(s). The higher this percentage on a send/receive level, the more successful, I believe, you'll be in what you're doing. You could spend years becoming a leading expert in a specific role, but it may be worth spending some time talking to complete strangers and seeing how well you do. Over time your confidence will grow and you'll be able to express the skills you already have, a lot better.