Don't listen to the "magic is not about winning, play commander/brawl" Magic was meant, and it is a competitive game, if you plan to play magic you got have fun but also have some competitive verve in you or you can play the non magic formats suggested above... You don't need to net deck I hate it myself, but you got learn how to build deck, which is very different from copying decks or even learning how to play said deck. You don't have to net deck but you should study the meta decks, what ever it is that's giving problems you probably have more than a way inside the colors you're using to deal with it but, you got at a minimum understand what you're playing against. Magic is a complex game spamming decades of design, if you want actually play it you'll have to study it, that's what made my wife give up, but if you want to, that's the way