Need advice about my behavior(s)

I think my story needs some explaining. I've masturbated every since I was a kid and discovered pornography at around 13. For several years, I masturbated to different types of porn almost every day and no one knows about it to this day. What scares me the most to this day is that it was gay porn containing old, fat men that gave me the best reactions. By the way, I'm not gay as I never experienced sexual attraction to a man in real life. I'm not even sure why I enjoy gay old men porn when I'm not attracted to anyone on the screen.
I've been this way until before I turned 21, where I attended a church sermon about sexual immorality (I grew up in a Christian household). This inspired me to start a journey of attempting to break my dirty habits. However, I always find ways to relapse. The longest streak I accomplished of not fapping is a month. I have done a lot of research on ways to overcome the urges, and they all say to distract yourself by doing something productive. That is easier said than done. I have trouble staying occupied if the urge to masturbate constantly reappears in my mind. I especially can't trust myself to ignore it while home alone. So, I need some advice. What should I do if the urge pops up again? What are the best activities to distract myself?