The difficulties of fasting are mostly internal. If you get your mind set on fasting and stay focused, and stay mindful of your self, that is most of the battle. There are of course some things to learn, for example, how to use water properly, how to get out of a chair, stand, walk, sleep, etc. Once these are known and practiced, they makes fasting much easier.

If it has been a very long time, I suggest starting with a three day juice fast.

I will be starting a 40 day fast on water only very soon

peace, robert