I suggest finding out what the core of this mulitplayer lmvu-like chat avatar would be, and then implement that with the tools you're most comfortable with. Scratch all the things that are not absolutely essential to making that avatar; if it comes down to a single, challenging task, you can take a…

Pick a highly popular game in the same genre, and figure out what they do.

If you're an RPG, check out Skyrim, or Witcher 3.

If you're a shooter, check out Overwatch or Apex Legends.

If you're an RTS, check out StarCraft II or Age of Empires 4.

If you're an action-adventure, check out Tomb Raider or As…