Hi there, good choice! We usually just put the straps as follows:
- front strap second hole from front insert
- back strap second hole from back insert.
This is a fairly wide stance, which works for most people, if you prefer it narrower, are slightly shorter, then go backwards on the front strap to get a closer stance.
Mast foot, 1 or 2cm back from the centre, is usually the best spot, here it's also a bit personal depending on your front/back foot pressure in riding, as well as conditions - onshore you want to be slightly further back for shorter, pivot type turns. Sideshore/dtl, you may go a touch fwd for more control. good luck and enjoy it!