Good luck Mighty. My advice: one day at a time. If you can do one day, you can do two. If you can do two days, you can do a week, and so on.
Make sure you are keeping your time online or looking at a device to a minimum. I know that's easier said than done, but you have to avoid the temptation.
Spend time with other people.
Do anything to mess up your usual routine that leads you to porn.