I echo was @sandm says. I have a friend with an '06 21v. He gets a nice surf wake. Running about 1100# in each locker. A slight list to the surf side, usually done with people sitting on that side. Surf Suction Device on the opposite side. Works fine.

Skip the beginner board for yourself and just buy a good one like a Phase5. You really cannot go wrong with any board: Model-X, Hammerhead, MVP, etc. The best ones are the leftover 2019s that are cheaper or finding one used (which is harder).

I have a few boat-boards that I let the beginners use.