In this repository you'll find the CC0 1.0 Universal licensed Arch-chan 2D model in both the Inochi2D and Live2D formats.
Download files, open Inochi2D folder, drag Arch Chan Model.inp in to Inochi Session, connect VTube Studio to Inochi Session and you should be good to go.
If you're using OpenSeeFace without ARKit blendshapes you may need to set up the bindings manually.
Download the files and put it in a folder. Load the cmo3 file from the Live2D folder to Live2D Cubism Editor for editing. Open the moc3 file to Prprlive or Vtube Studio for motion capturing