Hmm the most complex card game I can think of is the magic the gathering mobile game. And not only the first game tutorial is quite extensive, but also very carefully paced. It doesn't jump to new concepts until you get some grasps of the previous mechanics. Of course the UI also need to be super clean since there's a ton of info you need to keep track of. And also you can access to each ability and card documentation at anytime during a game. Is quite a difficult balancing act, I would suggest finding a tutorial template that works really well in a similar game and try to adapt it, since I really wouldn't know where to beggin.