If only there were some sort of facility where teenagers could be taught new skills.
Anyway, here’s a helpful diagram. When I was hit on the temple this was one of the harder things I had to reteach myself. Don’t be shamed into not asking questions, and it’s alright if it takes you a while to figure it out. Don’t let someone make you feel bad for learning new things, or relearning old ones.
Sometimes, unfortunately, you have to teach yourself. YouTube is a valid option.