I do a 5 off 2 on fasting for 3 weeks every month. I don’t eat past 7pm on a Monday evening, drink some water through the day on Tuesday and eat again on Wednesday morning. The trick is to not over eat on the day after fasting. If you get hungry try taking a teaspoon of coconut oil during the day. I have found it resets my system, slept a lot better and found increased energy for training.
It has many benefits so I have read, also drawbacks. Depends on what you mean by “working”? If you are talking “fat” loose, “weight” loose, then if you are in a calorie deficit, where your body is burning more calories than you are taking in then you should be losing weight, this has nothing to do with intermittent fasting, just calories in, calories out. Also if you are trying to maintain or gain muscle your body needs calories right after a workout, if you are depriving your muscles of these nutrients your body will cannibalize it’s muscle and hold your stored fat for survival.
I personally suggest getting on a well-balanced diet with good fats, good carbs, and lean proteins. Slowly cut back on calories to let your bodies metabolism adjust and track your weights in order to see if you are losing muscle. If you start to get weaker increase your carbs 2 hours before your workout and lower them later in the day. If you track your food intake and your weights you will get to know your body and how it reacts and you will be able to make adjustments when things stop progressing