Girls, how do I start introducing the regime? Baby is 3 months old, go…

Girls, how do I start introducing the regime? Baby is 3 months old, goes to sleep at 11 PM, trying to put him to bed earlier, wakes up and plays around, gets up early at 6 AM, trying to extend it until 8 AM, but even then he wakes up every half hour between 6 and 8, sleeps for 30 minutes during the day, help