Tips
In an Aerial Twist you can get away with dropping your upper body low to the ground, before you takeoff, but you shouldn’t do that in a Cart Full. Instead you should be taking off with your upper body high and upright to get maximum height. But of course a low and whippy Cart Full is also useful. For swings and vanishes for example.
Don’t worry if you’re not completely inverted. Being just slightly inverted makes it easier to progress into Full Round or Full Hyperhook. Being completely inverted is usually easier to double.
If you want to learn how to invert fully, try learning Cart Front first, which is a Frontflip from tricker style cartwheel. Then treat your Cart Full as if it was a Cart Frontflip Twist.