@Luci @VTSocial First you should decide whether you want to go 3D or 2D.
If 3D then commission a modeler to make you a 3D model in the VRM format. Then you can use vpuppr ( https://github.com/virtual-puppet-project/vpuppr to stream with your avatar ).
If 2D then commission an artist to make a PSD cut for rigging, then either pay someone or rig the model yourself in Inochi Creator ( https://lunafoxgirlvt.itch.io/inochi-creator ), then use the model in Inochi Session ( https://lunafoxgirlvt.itch.io/inochi-session )