It's a good start point. You may need to get the kit to measure your ketones, a caliper to measure your fat body %, keep track of your weight, and eat properly (the most difficult part). Now what "properly" means is the most dificult part and that's were all the previous mentioned tools will help you; to determine where you are getting gains (if any) or you are getting to the shape you want. Keep in mind that after you get into some % you will have to start eating more fat in order to prevent muscle loss, check http://keto-calculator.ankerl.com/
It's probably healthier to be morbidly obese than what a pro bb will put their body through.
I've been doing IF for a while without trying to since I don't really eat breakfast and I really only eat lunch with my team because cooking dinner for 1 isn't awesome + delivery is too expensive.
It's okay for maintaining strength/losing weight slowly, but hunger/happiness on it really depends on the person. Some people don't do well with only eating 1 meal a day.