Accept that your hobbies are about enjoying yourself and learning new things. That's why it's called "hobbies" and not "work". Trying to make every single hour you are awake "productive" and "optimised" to achieve "goals" is a mentally unhealthy thing to do. Your brain needs time to just be happy and relax without stressing out about an end goal. Also (by the way) you and everybody you know and everybody reading this and everybody on the planet will die one day. So don't worry about it. Relax. Enjoy the ride.