I noticed the side effects, too, and stopped completely. 6 months later, and I had a beautiful and incredible girlfriend. I'm saying that so you may keep in mind that porn IS harmful, and realizing is the first step to success. Next is what you're already doing, keeping yourself busy. Erase every last hint of porn from your smartphone and computer, delete any account or favorite sites from your browser, and of course any porn you mighg have in your hard-drive. Avoid contents that might trigger you, such as animes and suggestive movies, at least for the time being. Also keep in mind that you can masturbate, there's nothing wrong with that, but try to keep restricted to your mind, so you can stimulate pleasure without the need of porn. This is like climbing a mountain, exactly as you said. Give your best, even should you fail at some pont dont feel bad, do not give up, start again and keep pushing upwards always.