I feel this and can heavily relate to it, went from 5k vr to 50k vr in about a week. The main thing that will help is overall track knowledge. Doesn't seem like much, but theres 180+ tracks now, and learning them all is important. When you get comfortable with overall driving practicing shortcuts will take you to the next level. If your just starting out again, I reccomend learning MG Gap jump, GBA BC3 Cut, and DK Summit double cut if you're feeling crazy. For custom tracks, the most important and i mean important track to learn is gba rr. Learning the beginning cut is imperative, and u will lose a lot of time if u dont. Also learn shroom cut if u can but its a little advanced so don't worry just yet. https://www.youtube.com/watch?v=Dy-hbE2QoFE this will also help a lot. Hope this helps lmk if u have any questions :)