I'd recommend checking out Habitica. It's a gamified productivity site&app. Depending on how or why one enjoys games it can be set up/interacted with in a manner that echoes some of those aspects. I personally enjoy the collection, customization and resource management aspects of it. Have barely dipped into the communal/cooperative stuff yet- want to flesh out my stats and skills a bit first but it's slow going due to how i've chosen to set up my resource generators- interacting with it in a fairly survivalist/hard-mode manner.
For relaxation I'd go with Stardew Valley or The Sims. SIms 4 is free to play, since EA expects people to get hooked and buy the several score of DLC. I've recently gotten into Stardew and found it relaxing and addictive. I also find Red Dead Redemption 2 relaxing, but I enjoy going for rides, fishing, etc and ignoring the missions.
I've been there, too, needing a break from competitive games for my mental health. When I felt like that, I turned to games like Stardew Valley and Animal Crossing. They're super chill and can help you relax. I also called the therapy hotline when I felt really down. I hope they bring you some calm during tough times. Good luck!