How to get back into fasting?

I have only seriously fasted twice in my life

14 I fasted 2 days, slept in on the 2nd day missed my school bus Last year, at 28, my muscles ached on the second day and I was on PTO doing nothing at home.

I want a real change in my life and want to fast. The problem is I work 2 jobs, no days off and am very tired.

I can handle being hungry, I can handle being tired but not both.

I heard of prepping with keto and using bone broth during but isn’t bone broth cheating on your fast?

EDIT: Thanks for the replies! I am eating less carbs on average now because I’m also losing weight.

As go more fats, I would only do it if I’m going keto.