Hey, I liked your prototype and especially the fact it's already playable, yet still simplistic. I'm doing a very similar booster opening card game and trying to come up with the design ideas for it, but don't have a playable demo yet, only prototypes. I see how far you are already in the development, and that's super cool!
I've developed a web-tool for generating cards. Maybe this tool will also help with development of your game it's easy to prototype the designs.
I would be gratefull if you can take a look and provide any kind of feedback.
Here's a link https://stonehill-games.itch.io/tcg-cards-generator
I'm still learning unity, so if you have any suggestions on what to read and study to achieve at least the same progress as you do I will be very grateful!