What is his schedule like and what is your routine? In order to help you get him on something of a regular schedule, it would help to know what exactly is going on first.

Get into a routine so baby will know it's about night-night time. For example:

- shut off noise makers like TV, radio, etc.

- bathe and dress in night clothes

- slow rocking with book reading session

- meditation type sounds to sooth for sleep lights out and leave the room.

Wow, you have a lot on your plate for a parent of a young child. Getting him on a schedule is important but I would also suggest getting a friend or relative to come over and help you watch the baby so you can get some rest would be a wise thing for both you and the child.