I second the exercise thing. I needed to get out of the house when Covid first hit, and ended up hopping on my bike and just exploring around. I gradually wanted to hit up more of the city, and in SF that meant hills. Both my anxiety and my resting heart rate plunged as a result. I now listen to my heart to fall asleep because it's so gentle.

I imagine the hills essentially provide the HIIT type situation for me, and my previous realization before reading this was that I absolutely need to be out of breath, heart pounding, at least once a day.

It makes a world of difference.