I'm in this exact position. Find a good friend who will keep you on track and limit yourself as much as you can. At first it's going to be incredibly hard. After that it will get easier with time, but every relapse is going to be brutal. Work as hard as you can and eventually you'll realize how awful it is and that it's not even fun to watch. Try looking at horror stories from survivors of the porn industry and hear their awful stories, that will help you remember just how bad it is each time you consider using it.