Thanks for sharing your project. Here are some high level comments:
You can not mix 3D physics blocks and “set speed” blocks. If you are controlling objects using the 3D physics engine, you have to delegate all movements to the engine, and only use blocks in the “3D physics” category to make objects move/turn.
We can’t add the animations you requested since they are not available in the mixamo.com library. You will have to use the animations available now.
For specific questions on individual blocks, can you please try to ask XO first?