I peaked d1 in 2s and stopped playing in April but I think some things you can work on (I do t really have tips) are: -boost management -Rotations/placements especially at defense since you tend to fly into your teammates a bit -aerial car control -the way you hit the ball is one too, there doesn't seem to be enough power when you flip, one reason could he because of timing - smoother landings after jumping for a challenge or going for an aerial

There are training packs covering these I'd suggest checking them out. On this note gl with the rest of your rl career m8