All things done repeatedly are addictive. Doing nothing and being lazy is addictive, just like anything else done repeatedly. You change by starting doing something repeatedly, and it becomes addictive.
You definitely need to stop masturbating, I'm assuming that you are masturbating and it's a proper assumption, because masturbation makes you passive. You are thinking with your gut, and satisfying your needs, and brain is addicted to being satisfied to the point that it gets everything it desires, you have no need to improve anything. You get lust for a pretty girl, no problem, that desire is satisfied through your right hand. Nothing else needs to be done. What kind of change do you want to happen if you got everything going on for you?
We have a forum section,
Health and Fitness, you figure out your fitness routine and diet plan. You sign up for 1 month of gym membership and you follow through with your routine. All the while improving on exercises you do, breaking that muscle down, and growing.
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How do you get started? Is a question of how do you quit your addiction to your current boring looser life style. Through doing repeatedly something else - in your case it's nofap, gym, diet.