You got this

I'd argue that a great many people know what they're doing but a fuck-tonne of them don't know how to give themselves the credit they deserve.
It's like they're waiting for some mystical uber adult to give them a certificate saying they're competent enough to trust their own judgement.
What is it people think "knowing what you're doing" entails?
Most of what we do day to day is not new in terms of the human experience. We eat, sleep, work, socialise, raise our children, etc.. Most people manage this, usually through a combination of learning from others and their own mistakes. Are a lot of people just not able to acknowledge their own competence at these things?
- Perhaps the paradox is that if you find someone who actually knows what they're doing, then who of all the people who don't know what they're doing will even know that the first person knows?
  People will tell you that you're right or wrong based on their own experience which is likely to be even more wrong than someone who is actually right.
  
  I mostly find the framing tiresome. It's a sort of learned helplessness.
  It's trying to frame life as something one is only "correctly" handling if everything is planned out in the tiniest detail. Anyone trying to do anything of the slightest complexity knows that's not a good way to manage tasks.
  Of course, if one goes through life imagining that what one should be doing is being an adult with a plan of infinite complexity and anything less is "pretending" (or "winging it", or whatever) then it's easy to keep the infantilising personal narrative going. "I'm not a real grown-up" and shit like that.
  Defining a "real grown up" as a hyper-competent person found only in fiction or through the eyes of a young child then yeah, we're all making it up as we go. But given that's a bloody stupid standard, I think we can all be a little nicer to ourselves.

Oh good. I was worried, because I don't understand the world around me.
At all.
.......at all.
- But you should understand yourself.
  If not knowing everything, then at least to be aware of your common patterns, and triggers that break those patterns.
  The people around you are usually mostly the same. Just some are psychotic narcissists.

Life's just a game