A little hand with a Card Game

Hi there everyone! Sorry if this is the wrong place for this or anything, just thought i'd give it a shot and see if there's anyone out there who can save me from my stress.

At the moment i'm trying to work on a 2D card game using Unity. I've currently got a menu sorted, all of my scenes are ready to be filled and my Card class has been created and instantiated in my GameManager for a list of 30 cards. However, I am having a lot of trouble figuring out how to go about the rest of the game. I plan on having the cards as images responding to integers, so that when say '1' is called by the game, the card 'Warrior' will appear there. In the grand scheme of things, cards will be drawn and played in order to boost the players health or reduce the enemies health until there is a clear winner.

Is there anyone who can help me with this either on here or personally? Apologies if i'm asking too much, just the stress is really getting to me at the moment.