So, I would like to make a frame that displays a player avatar. I see these games with UI objects that contain live models of their avatars displayed in a frame, probably using CFrame or something. How would I do this?
Viewport frames.
Chirty Tharacters
Not sure if this is exactly how they do it, but you can try using ViewportFrames.
Viewport frames can help you. You can implement Character Animations in the viewport frames as well using RunService