This was a nice learning process, this little guy is fully face rigged and he has emotion hotkeys, a hotkey to change his entire outfit and one to simulate wind (see video!)
There is a ton of videos about how to use Live2D on Youtube! Basicially you draw a chopped up version with every moving part on a different layer, pull that PSD into Live2D and then go about setting points of movement. Earwings are probably easy enough to do, too! And once you're done you put them in a program for tracking you via webcam, I used Vtuber Studio on Steam for this one cus it's free :)
There is a ton of videos about how to use Live2D on Youtube! Basicially you draw a chopped up versio