>>2831587You know exactly what you need to do but you always lose the battle against your body when it floods you with a negative feeling as soon as it's time to rewire your broken reward system and put on your shoes for a walk, resist the urge to eat trash, keep your dick in your pants when you have tits on screen or learn someting instead of doing the unhealthy but easy activity that gives you (too much) dopamine.
It will take time, but your brain will learn to enjoy your new activities and accept them was way to feel joy.