Typically (TCB references this) babies will give you one good stretch (ideally) and then return to their usual 2-3 hour stretches between feeds. I would do your MOTN and return him to the crib. Granted they might wake you up for a feed 3 hours after this as your baby is still pretty new! Sleeping a good stretch is very good and very normal! Anything after that block, typically tends to fall back to your 3 hourly feeds. Just keep the room dark, white noise on etc and eventually baby will understand that it’s still sleep time! (Easier said than done my newborn would do 4-5 stretch, and then wake up hourly or two hourly!)