Be calm, it takes time to work into the discipline of fasting.

There are things you can do to calm a hunger pang, especially a gentle walk, a bit of time in prayer with jesus. In general, getting away from the kitchen and the pressures of eating (socially) is vital.

You likely know this well. :)
I've done 3-4 weekend fasts (fri evening to sunday night). It's a little easier if you think of days as they were for folk before clocks - saturday begins at friday sundown and ends at saturday sundown. It's much easier to start your thoughts of fasting when you are already naturally about to lay down and rest. :)

I wish you blessings in your efforts!