If you have never used Unreal Engine, other game engine, or 3d software before, welcome!
We would recommended to start here before jumping into use the tool
How the Impulse Avatar Works
Runtime IK Retargeting in Unreal Engine | Unreal Engine 5.7 Documentation | Epic Developer Community
Mocap Manager Deep Dive
Mocap Manager Tutorial | Tutorial
Troubleshooting
Is your Impulse Sample Project or other Unreal Engine projects you are working on not show up in your “My Projects” section for Unreal Engine in the Epic Games Launcher?
C:\\Users\\YourUser\\Documents\\Unreal Projects