it will be beneficial to you

I wish I knew the answers to your questions. I would say rather yes on all of them, except thee on concerning cancer - no I don't think you'll feed cancer on that sugar, it is actually a normal value not a high value. I hope you can confirm my hypothesis, and post your results as well when you fast (fasts - probably you will benefit from several fasts) ends.
On the other hand, if you feel energetic, you may indeed benefit from light exercise - nothing crazy though. Just walks and whatever you may usually do/ somewhat less intense also.