Understand the why
Copying instructions fails the moment conditions change.
Five days is enough to be shown everything and to understand about a third of it.
On a course you are busy handling lines and steering. The reasoning behind the instructions rarely lands, which is why people come home able to follow a sequence but unable to adapt when conditions change.
Theory is exactly what a desk is good for. Apparent wind, tidal calculation, forecast interpretation and passage planning all reward slow study, and none of them require a boat.
Then the practical side belongs to a certified school and a lot of time afloat. We are candid about that line, because pretending otherwise would put people on the water believing they know more than they do.
Copying instructions fails the moment conditions change.
Passages and dockings go better when rehearsed ashore.
Practical training in person, always.
Twenty minutes, free, on your experience and what to learn first.