well, I used to make characters for my personal VR chat needs. It’s quite easy to do but with metahumans it might not be as practical based on the number of bones, triangles and general performances for this use.
This and as stated in the license agreement, it’s more or less of an unreal product, exporting the model is fine (because you need to for some things like clothing, grooms, textures, etc.) but importing it into an other engine, even for personal use could break the license agreement (as far as I’m aware of).