With regards to shooting at a target that appears stationary: if you use that method in Sporting, you’ll likely end up with a bunch of zeros. I learned that long ago on certain true pair targets or Teal targets that appear stalled at the apex. Shooting them rising or falling is a much better plan.
You have to shoot them rising (and falling) in Sporting Clays because they are all going in so many directions unless they are straight aways. They will only appear stationary in trap if they are straight aways, or near straight aways. Targets won't appear stationary if they are going out to the side (hard rights or hard lefts) or across in front of you. And you wouldn't use a trap gun when you shoot sporting clays. Best wishes.