The trick is to allow custom avatar uploads (for the people who can make their own shit) and also have a set of public avatars that are in the anime-egirl/anime-eboy styles to attract the basic types. 

Make the public avatars rewards for lootboxes or some other monetization and this bit is important: make sure they're above the average quality of most of the existing eboy/egirl anime tda etc types we see in the current vr communities. Commission someone like digitrex to create the base idk. If you do that those players won't bother uploading their own, they'll just pay for the pixels to maintain status with their peers. Those people become the cash cows that fund the game for the rest of us.