Update 4: after I fed him at 3:15ish, he slept for another 1.5hr. When he woke up, I went in and soothed him, at this point I believe he smelled milk and once I got him calm and put him back down, he absolutely wailed for 15min straight, then my husband went and consoled. He cried for 13 min after that, then slept for 45 min, then cried again. It was after 6am by this point so I went in and fed him. He went back down very easy and slept another 1.25hr. When he woke around 7:40 it was close to his wake time so I grabbed him and snuggled in our bed with him for a half hour- a reward for both of us for making it through the night.
Overall- not bad, I guess I expected him to sleep longer? But it’s only night 1. I’m confident tonight will be better!