I think having confidence is harvested over years spent doing important things that scare you, and surviving
I think feeling confident is when that ⬆️ overlaps with short-term wins, like being helpful to someone or caught up on your laundry lol. Or even happy accidents, like a lull in the storm of family drama or having a good hair day.
All such a practice and a dance though, I struggle too sometimes of course, but this is my understanding of it atm