I hope someone can help: my subscription is silver but I keep getting thrown into unfamailiar kingdoms. I would welcome the opportunity to play unfamiliar cards in a non rated game, but when I dont know most of the cards, I am playing with one hand behind my back. Do I have any options?
I'm not sure exactly what you want.
If it's playing with cards restricted to your familiar cards in rated games: that's not possible.
If it's playing with cards restricted to your familiar cards (and maybe 1-2 unfamiliar): That's possible, either by pressing the "Practice game" button on the "matching" tab or setting "Respect familiar cards" on the table rules for a table you create yourself (then you need to wait for someone to join your table).
If it's something else you want, please try to reformulate your question.