If you're a fan of Stardew Valley and games like that, might I suggest Disney Dreamlight Valley? While there is a story (and there are extra character-specific quests you can do), you don't have to do them (or indeed anything). You're free to do what you like.

It's currently my go-to game when I want to play something but I'm just not sure what. Running around collecting materials to craft new items to decorate my Valley (or even just seeing what my residents are doing) brings me joy and whiles away the hours before I know what's happening!

Another suggestion would be Slime Rancher, which is another low stakes (potentially no stakes, you can turn off the one 'enemy' in the game that might disrupt your cosy experience - the Tarr slimes) game which has you running (and renovating) a slime ranch (funnily enough). The slimes are adorable, the music is very chill, and the world is so colourful I often enjoy just roaming around enjoying the scenery.