Set yourself a goal for some place to walk, could be a park, a lake, a gas station, doesn’t matter. The most important thing is that it takes you a reasonable amount of time to get there and back again (preferably at least an hour). You can listen to music or a podcast or an audiobook while you walk if you want to.
The point is that your body responds positively to a lot of different stimuli:
moving
open spaces
natural light
green things
Among others. You don’t have to do “anything specific” in order to get those stimuli and get your endorphins flowing. Once that happens, people typically start feeling happier, and get more of a desire to do other things, making it easier to do more cool things.