I want to get into a morning & evening routine at 33!

My job I can turn up between 8-10am but everyone else starts at 8am while I start at 9.30. I don’t do my skincare and I’m always rushing etc.
So if I want to start work at 8am, be at work for 7:50 so enough time to log on, get a coffee etc and travel time is 15 mins max.
I prefer having breakfast when I’ve been awake for about 2hrs so happy to have that at work etc.
What time should I wake up and go to bed if I need about 8hrs sleep? And do my skincare etc.