Hi Jody! I am a newly hired third shift worker and sleep is always an issue. I have yet to accomplish a routine that works! I usually try a meditation in the middle of the day and end up sleeping 12 hours or getting frustrated and sleeping an hour. 
I have heard that 90 minutes of sleep is best of you want restorative sleep.., of this designed for a short nap! ! I tread above someone slept for 9 hrs! I can’t do that
Well, 90 minutes is only the first cycle. The idea is for this track to lay a solid foundation then let your brain do what it naturally wants for the rest of the sleep period. Working nights is going to wreak havoc on your circadian rhythm, which is the most powerful process when it comes to sleep. You can try and simulate day time by using bright lights, unless you're working outdoors...
TracyM🥰