4 month old - need advice

I’m having a hard time getting my baby to get into a nighttime routine. My baby doesn’t fall sleep for the night until after 10 PM closer to 10:30.  he will wake up one time at night time to eat and then he will fall back to sleep quickly he doesn’t have a hard time with that. Since he goes to bed so late that also means he wakes up for the day around 10 AM. Any advice?