I think that there is plenty of flexibility in how / where to fast. I think that it is most important that you:
1) Set out goals / parameters before hand
2) Communicate your plan with someone close to you, to add more definition and concretion to the commitment
3) Have a definitive end date / goal in mind.
I did something close to a Nazarite fast once, was pretty cool. If you are still WFH, might be a good time to try it:
https://www.gotquestions.org/Nazirite-vow.htmlBasically, don't drink any alcohol, and don't cut your hair or shave, and don't do any viewings at funerals (If you are an EM professional, I could see this not being possible). Dedicate yourself to God for the duration of the fast. Then, cut your hair, shave your face, at the pre-determined end to break the fast.
It's good for your health to get away from alcohol for a while, and this is a fun way to do an alcohol fast. On the dedicate yourself to God front, I fasted every day after sun-up until I had spent a certain amount of spiritual study for that day (I was waking up before the sun back then, so it was usually a situation where I ate a good breakfast, skipped lunch, and then dinner after study time). But, you could set up your own.
My point is, not sure you need to follow some other calendar, even though I could see those as a good place to start since they have been followed by many for long periods of time.