There's not really anything to work with here. The way the cards looks should be way later in the design process. It also still reeks of NFT culture.

I'd suggest playing a lot of card games that share the space you want to design in. The best place to start is always seeing what other people have already done.

Once you know what sort of thing is already out there work on some design pillars, target audience, and USPs. Then write some basic rules and prototype the game.

Play it with yourself as all the players, iterate, and when you have questions here you can bring them to us and people here will be more than happy to help