By 2 months, some babies can sleep five to six hours at a stretch. Your goal is to make sure they're nighttime hours. If he's very irregular, you may have to take the initiative and make some parts of his life as predictable as possible. The more consistent you can be, the easier it will be for your baby to settle into a routine. Schedule meals, baths, trips to the park, and bedtime at roughly the same time each day.
Schedules become more important to family stability and a baby's well-being as time passes.
If you're very irregular, it will be difficult for your baby to figure things out, learn about life, and be able to trust that the environment will meet his needs. Children thrive on regularity and consistency throughout childhood. Help him settle to sleep. Comfort him, but not so much that he gets all wound up again. Beautifully awake in the first hour of life, they often follow that alert period with a deep sleep.