On the question of speed.
I tell students that they should control their speed with the transmission (forward, neutral, reverse) to maintain steerage way. The throttle should only be used in reverse to stop the boat.
We usually use fin keel boats. Full keel boats need some additional speed to mainatin steerage way.
ISPA Yachtmaster Offshore Instructor Evaluator
Sail Canada Advanced Cruising Instructor
IYT Yachtmaster Coastal Instructor
ASA 201, 203, 204, 205, 206, 214
As I sail, I praise God, and care not. (Luke Foxe)