I'm glad you found a solution to the docking difficulties you were having.
I to have a long history of boat ownership and operation spanning over 35 years in a wide variety of both power and sail in varying locations throughout the US as well as asia.
I do find though ,that a refresher course always has something to offer me and enjoy a new approach as well as a fresh perspective from a different instructor. Never a day passes when I fail to learn another newance of boat handling. I guess that is why, after a considerable time, boating continues to hold my interest.
never to old or too experienced to learn or improve.