Cycling: Get a bicycle and start exploring your area. It doesn't need to be a nice bike; check garage sales and Craigslist and get whatever fits comfortably. Wander off your usual routes and you will encounter new corners of your town that you never knew existed.

Music: Pick up a used acoustic guitar, electric keyboard, banjo, or whatever you can find. The world is full of inexpensive books and free YouTube videos to teach new students.

Drawing: Make doodles, little comics, or sketches of whatever is around you. A pencil and paper are all you need. Look up YouTube videos for daily sketching practice exercises.

Amateur radio: An entry-level license involves a basic quiz and a nominal fee. Cheap radios can be had for less than US$100. If you meet an old timer with a garage full of gear they might hand you a pile of old equipment for free.

Of course, any of these can become expensive and time-consuming hobbies if you go down the rabbit hole. But that just means you have found something you love.