^yes, you can definitely have fun just playing the game being a f2p. The game has so much contents, and just exploring the story and the map is super fun. Do remember that it's a gacha game, so do try to contain yourself if there's a new character that you can't get. Be happy with what you get, play how you want, don't try to optimize the resin (daily energy to farm) and you will have much more fun.