Well done on the first fast. They do get easier, but the first few are hard ! Worth it though when the results kick in.
I too was very tired with the first few but I just went to bed early
Try to eat when you are hungry in the morning, and even extend the timing of your first food. Alot of us found that we are just not hungry next morning after a fast, weird I know. You go to bed thinking, I could eat a horse, then next morning, you have lost that feeling. Try to get into a habit of eating when proper hungry. So lots of tummy rumbling !
Water is your friend so when you feel hungry, have a little water and wait and see if it goes away.
Since my first fast I have only had one breakfast in 7 months. The non brekky next day kicked in from the first fast.
You will soon find what suits, just watch the foods that can spike, like bread. Nothing wrong with having calorie counted food on a fast as its quick and takes the guess work out. M&S count on us are fab, just check they are for one person as not all of them are !
Roll on your second fast, and good luck