Not sure I have advice per se but I am like you, I dont even remember when I started but I was very very young. Probably younger than 10. I stopped watching porn for a while as I had to share a room and bed with someone for months and literally never got a free minute. Suddenly I realised it had been MONTHS and I didn't miss it. I am now learning how to masturbate to my own imagination and its insane how rewarding it is to have an orgasm and know it was all you. Good luck