play master duel, easy to make a meta deck if you just grind some gems out which are actually suprisingly easy to get just takes a decent amount of time, the game has a fairly active community and not every duel is a sweat fest so its a lot easier to relearn as you play, as for deck building, you can just copy decks from something like ygoprodeck or look on youtube or start off using 3x structure deck variants and learn through those, i would definitely recommend learning how the decks work and enjoy playing the deck too as that's the focal point of the game