The bobbin turns can be calculated.
This is a typical 7 string bobbin. (see below).
To calculate your custom bobbins, I need the length, width, height, flange.
I need those dimensions in inches, like the bobbin shown below.
As far as the stacked design you show, I'm not familiar with that design.
I can also calculate that bobbin with dimensions in inches.
For new winders, I always recommend starting with something simple, like a strat single coil.
My wife who has taught sewing, recommends starting with a napkin, handkerchief, or a pot holder, not a fancy dress or dress shirt.
** If anyone has any input or ideas, please feel free to jump in!