2 tips I can share with you that helped me, and what I know would help a lot of beginners (and maybe some more experienced tumblers as well) is to:
1. Never look at the ground. If you do that is where you're going to go.
2. Land on the balls of your feet, not flat foot or heels. This is essential for an efficient punch or when blocking. This tip is what landed me my first standing back tuck to punch front
