You simply have to prioritize it over some of those other leisure activities.

Personally, I strongly recommend getting a door frame pull up bar and a set of gymnast rings to go with it. This should provide all the equipment you need for a reasonably good body weight resistance training routine.

For cardio, there are many options. Running? You just need shoes and 30 minutes. And you only need cardio once or twice a week.

A little exercise is like a drug. It makes me feel stronger, smarter, more alert. You don't have to go to a gym and bulk up, you just need to start somewhere. Do not let the perfect be the enemy of the good.