You might want to consider intermittent fasting, just reducing your eating window each day. Lots of people do OMAD (one meal a day) or TMAD (two meals a day) and by having the tightened window (4 - 6 hours), it makes it easier to restrict calories. It's much more sustainable than extended fasting. And now that you're likely in ketosis, it should be easier as well.
I'm pretty much a TMAD person already. I rarely eat breakfast. I think this is why I was able to dive into an extended fast. My next extended fast may be just celery, lettuce, nuts - just something to gnaw on.