First of all 50 days is not a good idea. Most people lose electrolytes by then. Also there are people who have done that under a fasting expert's supervision.
It is a good thing that you are fasting to clean up and lose some weight. You will get rid of all your small issues. Remember to drink water only as per thirst. Walk for 20 minutes everyday. Rest a lot and stay warm.
My suggestion would be to take one day at a time and not push yourself. If you have to break your fast for any reason, you can always refeed and fast again.
I do not think you will lose 60lbs in one fast. On average one loses 1ib per day.
Yes, please keep posting and cross post on Water only forum as well.