When did baby go in own room?

My 7 week old baby was sleeping terribly in bassinet so we tried his crib in his nursery the last few nights and he’s doing much better! I slept on the floor next to him and got an air mattress to keep seeing if the crib will help him or if it’s just a coincidence. But if it is that he does better in his crib, I don’t want to sleep on an air mattress forever.

What are opinions on letting baby sleep in own room around 3-4 months? I know AAP recommends 6 months of room sharing to reduce SIDS but I wonder if since we don’t have any other risk factors (crib by himself , put down on back, temp controlled, no smoking or drinking from parents) if it really makes a difference.