Hi Dillon,
I use starters too and maybe I can help.
on elevated greens, the ball lands on a much flatter trajectory which means less carry and more roll.
Clubbing up and adding backspin is a good general rule, but not every starter club is created equal.
Your 5, 6, and 7 iron (160, 150, and 137 yards) lose quite a bit of distance when you apply backspin - even without elevation change. Typically, in light winds with full b/s and starter balls, they will fly roughly 145, 138, and 130 yards.
When dealing with a situation like #4 at congressional where you might have 135 to the pin and it's 18' above you, I would use a 5i (160 yards) with full back spin
Your 8 and 9 iron and your PW don't lose nearly as much distance as your mid-irons do when you apply backspin, so expect them to fly close to the rated distance with b/s (no elevation change).
Your long irons will also lose distance with b/s - 3i (180) will fly around 165 and 4i (170) will fly around 155
With starter clubs, it's sometimes necessary to club up twice, but plan on a ton of roll after it lands.