I think there’s a difference in average maturity between US teenagers and European teenagers. I moved to the states when I was 20 and was shocked about how childish some of my new peers seemed. And I remember also being completely surprised I couldn’t even lift my dad’s case of beer into his trunk (he’s a wheelchair user). The cashier flipped out when I picked it up.
Job that’s starts at 12am…flight attendant!
But also when I had trouble sleeping as a kid my teacher told me to describe my pet to myself in great detail. It worked and since then I’ve described other things, or tried to visualize my way to work or my dream house. It somehow keeps my mind focus but is also relaxing. Hope it helps.
Reading ghormenghast also helps.