Nature and plants are my favorite too. Its very cheap, and hiking only cost travel to outside. Bird watching is a great way I find to ground myself. Then bug watch, and plant watch. The only app I grant location data is the Merlin app. Ive learned so many birds using it. Theres an app Picture This that helps identify plants, and learning about the living things around us, really is.. it lowers my blood pressure anyway.
The opposite of social media is nature imo. Its a connection long standing and worth noticing.