I do intermittent fasting, I’ve done longer fasts in the past and a few days a week in the past as well. It’s just a matter of staying committed to your goals.
I would be careful doing fasts right now for more than a few days with the virus going around as a short fast can be helpful but a longer one can weaken you temporarily.
Also, I don’t think that traditional fasting is that great overall for weight loss - I’d recommend diet (caloric deficit)/exercise and maybe intermittent fasting to help with caloric deficit. My mom and aunt were doing this type of fast that you’re talking about and they lost some weight through it, however long-term it’s really difficult to maintain this type of regimen. I think it’s healthier personally to just do a caloric deficit and focus on eating smaller portions overall.