Can you import your own .jpg or .png characters to use in Motion Live 2d or can you only use CA characters? If you can only use CA characters, are there only certain ones you can use? I see that if you click on

you can only save or open .json files but if I convert a picture to .json, it still won't open. Also, is there any workaround for glasses? If I take them off, I can't see what I'm doing but with them on, it can't track my eyes. Any ideas?
Thanks for your time.