It's a shame i barely play the game anymore, nothing that will happen any time soon really interests me (like new characters or story) and im so full on everything that i dont really know what to do. At the same time i've been playing for so long, it would feel like a waste to just stop entirely
In that case, try to made a new goal or new challenges. Something like, "Can I beat this CQ with only using low rarity servants? " or something similiar. I learn it from people who play the same game for years, like GTA V.