8 week old baby - no sleep schedule?

I’m just curious if I’m totally screwing up my poor baby. I let him sleep and nap on demand - I don’t let him sleep more than 3 hours at a time during the day to help with nighttime sleep but other than that we’re not on a timed schedule. It’s extremely difficult to get him to sleep at night so sometimes he doesn’t go to sleep until I do around 10 or 11 pm, wakes up around 2 or 3 for food then until 6 or 7am. He naps once in the morning and in the afternoon then a short one in the evening. But there’s no actual time, I just let him sleep whenever he’s tired. Is this okay for him for his age? His witching hours are basically from 7-10pm...