Kudos to you for recognizing this is something you should tend to.
I think all of us have experienced different and increased levels of stress, anxiety,, depression etc over the course of the last year.
Lots of good ideas above, my addition to the conversation would be bird watching. I know, it sounds corny, but I am one of those avid bird watchers, the kind with binoculars in the center console of my truck. I find that taking a walk or a hike, and just sitting down in itself is calming. Then, when you sit there long enough, wildlife starts to do their normal routine, and you are the voyeur.
It takes some concentration to notice little details in plumage and behavior of all birds, but that totally forces you to unplug from everything else in your life. The longer you sit in an ecosystem, the more you will see and learn. The documentary 'My Octopus Teacher' is a great example of that. It is also a great example of how one human, who was in a dark place in his life found that nature could heal and inspire him.
Good luck to you, and take care of you.