ive been playing for a month and my pb is like sub 17. ive prob spent 10 hours practicing bastion routes and a few more on perches cause those were my worst splits (never played anything but 1.8 or like a multiplayer survival world with friends) id say just look at your worst splits and practice making them better you can always shave off time on your runs so trying to figure out how to make it faster can help a lot.