I’m a bit of the opposite. I usually sleep around 3-4am and am up around 9-10, work until 6-7pm and eat dinner right after. As long as I’m busy throughout the day I can manage the hunger temptations. After dinner, it’s mostly a matter of trying not to snack. Drinking tea, working out late at night, and simply buying less snacks has helped me maintain an OMAD diet.
Your schedule is quite adaptable to IF. Depending on what your eating window is and how many meals you eat, you can do something similar. You can either eat right before and after your afternoon nap, which will essentially be a 20-4/18-6. Alternatively, you can eat a mid-work meal and something right when you get home if you can manage not eating after your nap.
Either way, you can do it; you got this!
You can definitely do IF, I think the hardest part for you would be finding what works with your schedule. Most people are asleep for a big portion of their fast and that makes it easier, but that doesn’t mean you can’t find a schedule that would for you. There’s 5/2, alternate day fasting, or more typical daily schedules - and every day does not need to be the same for daily approaches. I would start with 16:8 and see when it’s best for you to eat evolve yourself approach from there as you learn more what you like.
I too have a very irregular sleep schedule, sometimes I sleep midnight to 3am then work until 8am. Then nap and back to work at 9pm until midnight. Rinse, wash, & repeat. I find that I sleep better without having just eaten food. Since you’re in a coffee shop I would presume you have access to drip coffee. I would fast until you’re finished with work, then have a 6-8 hour eating window.