I wanna know how much weight I could lose approx in water fasting

Hi everyone!
I’ve tried many diets lately but I can’t stay consistent in any of them, I’ve been non stop binging lately so I wanna do water fast to resit and feel better about myself, I’m planning to do 17 days water fast. Last time I did water fast was 3 years ago I did 12 days and I lost 8 kg, I hit the gym that time as-well.

Also I was wondering since it’s water fasting can I also drink zero calories soda or I have to completely limit them off? Also what supplements is okay to take while water fasting because I want to try to prevent muscle loss as much as possible!