2.5d milling for beginners

Hello people, ive been milling 2d work for about 13 years now, boring basic stuff for my company, but now the boss has upgraded our cad cam software to onecnc xr5 pro, dont ask me why coz we haven't used it since we got it 12 mths ago, but now I wanna start using it for my own jobs, -badges mainly, maybe a bit of decorative carving, but i know its gonna be a pain in the backside on this software.......so my question is, does anyone know of a good site where I can get pre made models to download? Or any easy to use software I can get that'll convert jpeg into workable models?
Thanks for any help in advance