A T-pose or an A-pose works for the Human skeleton. The character can face any of the four horizontal directions; Rig2Motion tells which way from the geometry.

Yes. Select its meshes and create the skeleton; Rig2Motion fits the rest shape, and Bind takes the old skeleton's modifier off and tells you.

No. The rig is Blender's own constraints and drivers without Python, so it plays and renders on any computer and on render farms.

Yes. The animations and props that come with Rig2Motion can be used in personal and commercial projects, including games you sell.

A 170,000-vertex character binds in about 4 seconds and a 660,000-vertex one in about 8, on an RTX 4060 and Ryzen 7 3700X class computer.

No. Everything runs inside Blender, including AI Assist, the optional landmark models that refine shoulders, elbows and fingers.