Before I spent time working out more, I would turn down invites to go rockclimbing (too difficult), kayaking (too exhausting) or anything else that required exertion. My energy levels were low and my general coordination was terrible. I generally felt I couldn't work out because I'm a stereotypical nerd.
Once I realized that working out was more about regular effort than anything else, I quickly gained a lot of benefit. Pre-covid, I was mostly into weightlifting and martial arts, and these days it's a lot of bodyweight workouts and using the rowing machine but the details don't matter very much so much as being active. I've gone from never going out to do things to now knowing I can go run a 5k, join in on rock climbing or whatever (and generally not even be sore afterwards).
I also enjoy sitting on my porch though I typically prefer margaritas. When it comes to the range, I've found there are a lot more activities I feel comfortable doing now - not just static target shooting but full length training courses, stress drills, etc. It's also nice to go to the beach and get a certain amount of positive looks. My SO enjoys that I work out as well.
Exercise does not "make you" happy anymore than eating chocolate does - it may bring pleasure in itself but that's a side benefit. Rather, the primary benefit is now being able to do _whatever_ strikes your fancy and generally deal with significantly less health woes and limitations. It's a nice experience that when you visit your doctor, you get a high five and told your blood pressure and vitals are good.