tl;dr fuck your glowing rectangle induced pseudo ADHD on steroids, read it or scroll on.
In engineering, as it should be elsewhere, the first step in solving a problem is in phrasing the question correctly. "How do I stop watching pornography?" is asking the wrong question. It is not the problem, it is a symptom, one of many you had no idea were all going together which will only seem obvious after going through the hard introspective work to connect all those distant dots. And declaring it "sin" or otherwise "bad" and therefore "I shouldn't do it" is a classic guilt trap to keep you locked in a vicious circle of anxiety and despair from "failing" again and again -- and you will until you figure out the mindtrap of your own making and how to extricate yourself from it.
What you are doing by asking "How do I stop watching pornography?" and trying to answer that with pseudoscience quackery like No Nut November, semen retention, and other "muh masculine energy chakra vibes" quasi-religious woo, is all the equivalent of having a persistent cough from undiagnosed throat cancer, but all you've ever done is kept consuming more and more Mucinex, Robitussin, and menthol drops which themselves cause all sorts of their own problems via side-effects and overdosing.
How's that working out for you?
So make the choice to dig deeper, the roots are underground; you are watching porn for more than one reason and they're each far more multifaceted than "I got addicted" which is in m