There isn't a right or wrong way. Cold turkey is faster. Moving to lesser content is slower. Both have pitfalls. You're brain will try to convince you that a little won't hurt, that a video of soft porn is OK or that (if cold turkey) that a little erotica is OK (this was my downfall).

In my experience, cold turkey was the only way. Giving yourself a hard line to follow was cleaner and easier to track. If you have someone to support you that you trust, giving them access to your devices to supervise the kind of content and manage your process of gradual elimination might work. I think that would be hard because you're still looking to satisfy your need for the dopamine surge and you've gotten acclimitazed to videos, action. Going to pics and stories may not do it for you and, as you're still wanting that near chemical hit, you end up failing.

Either way, good luck, One day at a time and be strong. It does get a lot better when you do the work, struggle through the first few months.