Aaah, okay.
My advice would be to start with a really big and floaty board, that points a bit "up".
This way you can ride on it, without foiling, to start with - thus learn to handle foil things much faster
Later, when experienced, you can use your "minimal" strapless plank
But for starters, a big board and straps will help IMO.
Just an advice from my experiences....
PF