Super basic way I learned to read combos is just paying attention to how the images interact.
Like, are the characters looking at each other or looking away? Is a card turned away from a solution, moving away from something dark, or stepping into something tricky?
I usually read left = past, right = moving toward the future. Are the cards looking forward, or stuck in the past?
Also notice if they’re in harmony or conflict, both standing firm or one kinda falling over.
Honestly, the pictures are trying to tell a story — just watch them and see what story comes through.