I would start skipping breakfast, just as a “playful experiment”, and see where that leads you. When you start feeling miserable or get a headache you stop the fast and adjust on that level for some days (you will see you adapt fast). Then you increase gradually, keeping it a pleasant experience so it does not feel “hard”. You will one day be able to fast for 40 or 50 hours without it feeling a terrible experience (my record is 70 hours, I always interrupt because of headaches, never because of hunger).
This is how I did it, and it worked for me because I never push it hard and am, therefore, ready to push it a bit further a bit later.
Of course, it slows the pace and it will take a while before I can do regular extended fasts of 48-72 hours (first wet, then dry). But I will not feel miserable in the process, which is important to me.
For dry fasting, I interrupted at the point of headache appearing, gradually extending. Now I can do a dry fast of 22 to 23 hours (my normal “one meal a day” as I am a slow eater) without any discomfort. Next year I’d like to get to the point where I can extend to 36 hours without headaches, and so on.
If it were a “tour de force” that makes the experience unpleasant or outright miserable, I know I would start looking for excuses to postpone it again, and again, and again…
Your mileage may vary…