Oh sorry, you said "I started playing again recently" and i assumed you had decent card collection. Well then, without knowing what you have it's really hard to give any advice, because you should probably focus on one good deck to be able to grind gold as fast as possible. Leaders you get with points and the new ones are actually the cheapest i think (?), but Dettlaff is getting nerfed and we don't know how yet, so hold your horses with picking him.
Buy Thronebreaker probably sounds like a ridiculous advice, but if you plan on spending any money on the game this is the best value because you get a lot of good cards and those are quadruple the price if you want to craft them ingame. It's a decent game with good story. Be careful where you buy it tho, as some platforms won't give you those gwent cards.
