Does anyone know of a good multiplayer tutorial specific to card games for Godot, if so please tell me where?
Unfortunately, I do not know of any such tutorial. However, I do know of some multiplayer tutorials that may help. They can be reached here and here.
The biggest difference between what these tutorials teach and what you want is that you will need to create the card gameplay you desire yourself. Despite these tutorials not being structured around multiplayer card games, the idea is still the same. The only difference is that in your case you just need the two clients (the players who are engaged in a match) to pass what they did on their turn (instead of player coordinates) so that the appropriate animations can play, etc.
This may not have been what you wanted to be told, but if you are willing to put in the work this game of yours will likely become a reality. Just remember, if you ever need help don't hesitate to ask the community. This has helped me overcome some major roadblocks in the past.