What beginners (to intermediates) gear and lessons look like.
Its usually best to start off on a really big board and smallish sail and depending on how fast you progress, the boards get smaller and the sail gets slightly larger.
You can use the same sail from beginner right through to expert. I reckon sail control is the major skill to learn and that you can learn a lot of that on land. I have mounted a sail on a wood plank attached to the ground and practiced turning the power on and off, tacking and gybing the sail, lowering myself down to the ground and back up again using only the sail, and using a harness.
When you can use the harness and footstraps and waterstart, then you are into the really good stuff.
This is the size of gear you would end up using.