Spin influences the height of the flight and therefore the yardage. I may or may not be the same than on the real golf course.
My beliefs:
Thick rough: topspin (ts),
sand bunkers, back spin (bs),
(both have little effect now)
headwind: little ts, tailwind: little bs,
uphill: ts
downhill: straight setting.
That said, your Starter equipment doesn't take much of a spin. Playing it, I used full bs all the time as it seemed to give longer ball flight.