When I started, I was doing it with my full time job, so I just treated it like a part time thing.
Most days I’d get home and work on my store from like 7pm to 12am. If I missed a day because I was busy, I’d just catch up the next day. That flexibility is real, but honestly it’s mostly in the early stage, before your ads are fully running.
Once your ads are live, it changes. Sometimes you gotta work outside your schedule. If something breaks in a campaign or something looks off, you have to fix it quickly. And customers message at random times, so in the beginning you try to reply as fast as you can.