If you like AC-type games, here's some I'd recommend:
- Cattails: become a cat is a life sim where you're a stray cat. You can join a clan, battle, hunt, decorate your den (in a rather limited way), change your appearance, etc. It's pretty simple but fun game and later on you can even start your own clan. I don't think it's a difficult/stressful game. It's also inspired by Warrior Cats but I've never read the series so I can't comment on that aspect.
- Spiritfarer is a game where you have a boat and sail it around the afterlife. You stop at islands along the way that you get to explore and you meet spirits you're supposed to help. There's fishing and you can do some farming on your boat, along with adding upgrades and rooms. It's not too difficult either and you can play it at your own pace. The subject matter might be an issue for some players (since the characters are dead and holding onto issues) but it's generally heartwarming, in my opinion! I'd recommend playing it on docked mode because the text is tiny otherwise.
- Cozy Grove is pretty similar to AC, except you live on an island with bear ghosts. You can farm, decorate, craft, fish/hunt bugs, etc. There's seasonal events. You unlock more locations/bears as you play. (Like Spiritfarer in tone, where the subject might seem morbid to some but it's presented in a heartwarming way.) It's very chill and I enjoy it a lot! If you're playing on handheld mode, I'd recommend looking at some screenshots first. I know some people who have had issues with item-finding quests on handheld mode due to size, YMMV.
I'm really intrigued by Shin-chan: Me and the Professor on Summer Vacation. It seems like a Shin-chan-branded (idk why either) spin-off of the Boku no Natsuyasumi series, which is a Japan-only Playstation series. In those games, you're a kid trying to make the most of your summer, you do things like catching bugs/fish, making friends, exploring, etc. and they're very chill from the little I've played. The one downside is that you've got a limited time in each playthrough (the summer vacation) but you can always play multiple times if you want to see and do everything. Idk how the Shin-chan compares, though, because I've been avoiding spoilers
There's honestly LOTS of life sim, farming etc. games right now, including many that have Switch versions. If you do a quick search for games like Animal Crossing or for life sim games on Switch, you'll find tons. One I would NOT recommend is Garden Paws. The PC version was a bit of a mixed bag when I played, but the Switch version had a number of issues that took a long time to fix... no idea if they're even fixed yet.
Hey, for some of us, cozy means cracking open a beer and smashing a golf ball down the fairway! 
Once you get your first chip-in, that sweet sweet sound of the ball rattling in the cup is what keeps you comin' back. ON THE GREEN. 
