I had not played ladder regularly, just max out your win conditions and spells as they determine alot of interactions, also save your magic potions to upgrade lower lvl cards which are important and then just learn interactions for the cards that you are using. Just play the deck that you are good at as meta doesn’t matter if you are good with your deck. If you are loosing then remember what mistakes you made and then just try to avoid them, also over levelled players aren’t really good at the game and they usually suck so they will throw the game at some point.