every professional says not within their first year, but the internet seems to be leaving it up to the baby. thoughts, experience, bees?

my one month old definitely prefers his stomach but i am terrified to leave him like that when he goes down for the night. asleep by 830/9, i flip him around 1030 and he's up to nurse around 1130/12 and he stays in bed with me until about 2am. then i get some solid sleep. i did a lot of cosleeping with my first (she's 5 now) and i'm pretty sure I didn't leave her on her belly until she was about 6m. i think i will do the same with boy but it's obvious he's so much happier than she was sleeping on the belly.