If you have watched all these videos and have specific questions then please ask.
I like classroom situations where a student will ask a question which will prompt other discussion on the subject so a lot more information comes out than originally intended.
Good luck in your learning
process. USCG Auxiliary Safe Boating Classes
is a good way to get started. A basic sailing class on the water
is another. You're in a great area but I don't know the availability of schools exactly where you are. Port Townsend seems to have a lot of sailing activity.