Try some cozy games, like Animal Crossing, or any of the dozens of other farming / crafting games. If you want 3D, Slime Rancher is a good option in this category.

Destide has already mentioned Stardew Valley, which is also a great choice.

You can also try some not-difficult side-scrolling game, like Rayman Legends, it has some difficult levels, but most of the game is very chill.