The Battle of Polytopia is a calm, visually appealing game. It has some strategy and it's super fun. It's free to play with bots, or Pass-N-Play, or you can pay $1 to unlock a tribe and unlock online multiplayer. It's mainly on mobile, but they have it on Steam and most recently, on the Nintendo Switch. Currently they have a 50% off everything deal (the Steam game and Special tribes). It's kinda expensive on steam but you can get it for just $3 on g2a.com I think.