Hey! Great question.
I just wrote a quick list of the things I have been doing. Maybe one or two will spark your interest?
But first, I must admit that so far I have been resting. SO MUCH REST! When you read my list below, you may not believe that I rest. But I have a very active mind and must keep it happy with many hobbies 
After a lifetime of being an overachiever, learning to actually deeply truly rest is proving to be quite a challenge.
Ok, here goes:
Self improvement is high on my list. I do little challenges, just to see if I can: a month of no caffeine, a month of yoga every day, a month of taking a 15 minute video of myself talking (learning how to "vlog), a week without TV (EEP!). Lots of little challenges to keep myself disciplined and sharp.
Next up is everything related to one of my biggest loves: FOOD. There is zero discipline involved here. And I am 100% ok with this.
When I land in a new place (and usually before I arrive), I have a great time hunting down stores for excellent ingredients: where is the best place to buy spices, teas, raw dairy, local organic farm fresh produce (farmers market schedule, etc). Where will I treat myself to the terribly expensive but totally worth it farm-to-table meal. Who sells local honey. I also take online courses for cooking. Currently in my second chef program for plant based cooking (it’s an interesting hobby but I am not a “vegan”). Locating the best locally raised and humanely slaughtered meat is beginning to be quite an adventure as well. The farmers are all such interesting individuals.
Next up is the local flora and fauna: botanical gardens & waterfalls & anywhere near large water. I avoid zoos and any tour involving animals because they make me cry. But there are loads of animal rescue places that have tours to raise funds. Super cute! I also learn immediately about whatever could be dangerous (I’m currently in Australia = relevant!).
Ok so food, flora, fauna… Oh yeah: can’t forget physical, mental, and financial learning. I walk daily, even if the pet I am sitting for isn’t a walker. And bring my camera and get super cool shots of the surrounding nature or city stuff. Whatever catches my eye. Makes for a slower walk though. For sure. If I’m near a beach, I aim to get sunrise and sunset photos. Because learning photography may help the travel blog I hope to create. But mostly because I am a nerd for capturing the perfect light.
I watch a lot of YouTube videos on various subjects. Listen to podcasts and Audible books. Often while I walk.
Financially I gotta set something up so I can keep traveling. So I’m currently learning about investing in DeFi, how I can harness the current capabilities of AI to work for me so I can work less (YAY!), and how best to outsource the building of my travel blog/create a brand/become a real “digital nomad.”
Then there’s keeping in touch with my family and my inner circle: weekly phones calls with some, hand written post cards and letters (people LOVE getting post cards!!!), hunting down weird candies and gifts for my kids and grandson. Putting together birthday boxes.
If I run out of things to do, I’ll go to the local health food store to check out their bulletin board. The very coolest and strangest activities are usually found on these boards.
Then there’s Duolingo, journaling, napping, a bit of self doubt occasionally, throw in a lil self loathing, add some regret, and of course wondering about the meaning of it all. Existential dread isn’t the same at mid-life as it was in high school, that much is certain!
All the dark stuff comes up when I turn off the dang TV… Which I just love because facing my shadows allows me to actually grow. Which quells the dread. Nice lil loop there. Ha!
Mmm… Here in Australia I looked on AirBnB Experiences… For the coolest tours, then went and drove to those places solo because being alone feels SO incredible these days.
Whew. Yeah. Maybe I need to go back to the drawing board and rethink how much I may not actually be “resting”… Ha ha.
The way I view it: basically this whole traveling thing gets (most) of us so far from our normal routine, that we get shaken a bit and get to see what we are really made of, what we are actually capable of, what we are willing (or no longer willing) to put up with (from anyone), what we like at this point in our lives (which gets kinda lost when raising a family), and basically what we are actually all about. It’s amazing!
I’m still obviously quite excited about being out here in the big world, so far from home. Maybe not everyone shares in this enthusiasm. But I’ve got a lil to spare 
I say enjoy the heck outta trying something new… Something you never even considered, or maybe even something you’ve always wanted to try!
Hugs and hi fives from Faith!