[Q] Wanna make a realistic FPS controller

I want to make an FPS controller that feels realistic, like when you move you really feel that your character has mass. In Unity I would’ve done that with RigidBody, but how do I do that in Godot 4.3.1 with CharacterBody3D? I know that RigidBody3D is not suitable for character controllers. May anyone show me the direction in...