I’m probably wrong about my first suggestion. If you’re just doing a flip then you can do it as a montage and keep “Root Motion Mode” set to “Root Motion from Montage Only”. Are you using a montage?
Have you looked at the tutorials on YouTube? There seem to be a lot of them. Even if you put your project aside and implement what they do in their videos, it might help you get familiar with the system. Then you can go back to your project and do it from a position of knowledge – and maybe teach me a thing or two.