I agree that work hours are less than glamorous if you want at least to survive if not succeed with an online business.
Some online entrepreneurs (like me) give up nights, weekends, holidays, sick days and vacations to keep the business going. I was shocked at how many people were starting an online business and expected to work 9 to 5. I was not shocked when they failed.
I managed to get and keep clients for the last 12 years in part for the above reasons. But it’s also a quick path to burnout if you aren’t careful. So when you do have free time, embrace it completely.