Sleep deprived

Writing to the moms out there for help! My baby is 6 months old and the sleep deprivation is still very real. My son goes to daycare and only gets two half hour naps a day. Because of that, I feel bad so I put him to bed by 7. My plan is that he sleep till 7am so he gets 12 hours of sleep. That never happens though. At some point of the night, either 2am or 3am or 4am, he will wake up and it will take me over an hour to get him back asleep. Any advice? Please help!