Plan sleep around shift work.
Shift sleep has to be scheduled backwards from the next shift and forwards from the last one. An hour of wind-down after getting home is built in, because going straight to bed after a night shift rarely works. Comparing the window between shifts against your sleep need — with two hours reserved for meals and life — exposes the shortfall that accumulates across a run of shifts.
Shift sleep window
Home at = shift start + shift hours + commute; sleep start = home at + 60 minutes wind-down; shortfall = sleep needed - (window between shifts - 2 hours)
Shift work is associated with elevated health and safety risks, including impaired alertness while driving. Follow your employer's fatigue management rules and seek occupational health advice if sleepiness affects your work.
Soon after getting home, in a dark cool room, with a wind-down period first. Delaying sleep until the afternoon fights the circadian pressure that is still working in your favour on arrival.
Many shift workers do — a main block after the shift and a nap before the next. Split schedules are a recognised strategy when a single long block is not possible.
Blackout the room, use earplugs or white noise, silence notifications and tell the household the hours. Light and noise are the main causes of short daytime sleep.