When did you move baby to own room?

Hi!! My son is 4 months and still sleeping in our room. I'm PETRIFIED of him being in his own room.... alone.. 😅😅 I was thinking closer to when he's 1, but I've been reading in face book groups and a lot of babies his age are sleeping in their crib in their own room by now....

How do you do it? Do you have a baby monitor and have it on all night? Does it get easier night by night?

I was sad and scared to leave my son for the first time to run errands, and now I'm glad to get out of the house by myself. Is it like that? Does it gets better? I get so sad and scared to even think of him being alone on the other side of the house with out me 😅😅 first time mom problems!!