Advice on ending co-sleeping…

Please no judging but I am still cosleeping with my June babe. It wasn’t always like this, I did breastfeed for a long time so having him as close as possible was just easiest. He started off in his own bassinet and from there he went into the playpen…. hed end up sometimes in our bed since he would night feed and it was just easier but somehow he’d always end up back into his crib. We’ve been in our new home since March and before that we had some issues with a leaking roof in our master so I had my mattress on the floor in my sons room. My mattress has been in my sons room since he was about 13 months up until we moved so 20 months. He’d start off sleeping in his crib and then sometime during the night would end up in our bed. Since we’ve been in our new home, it’s been our bed only. We didn’t mind it and still don’t but I am pregnant, due in October and it’s getting harder to co sleep. Hubby and I aren’t on the same page about what to do so I’d like some advice. His crib is in toddler mode and is set up in our bedroom (will stay here for baby sister) but he doesn’t want to sleep in it. I haven’t really tried other than one time for a nap and because I was just as tired I gave up and took him into my bed.

My hubby wants to get him into his crib since baby sister will be in a bassinet for a couple of months, keep them both in our room and then around 6 months once she outgrows her bassinet he wants to transition both baby sister to the crib and my son into his big boy bed at the same time. I feel like going from mamas bed to his crib to a big boy will be a lot of transition…. Especially when he sees his sister take over the crib and maybe she’ll stay in our room and he will be going alone into his room…? I had the idea of just preparing their room (it’s not even painted or anything) get him excited about having his own room, getting him his bed and try and get him to sleep there… I think if he’s there before she arrives it will be less stressful on him and on me. Does that make sense? Or am I wrong? Also the bed we wanna get has a good enough weight limit so if ever my hubby or I need to stay in bed with him it would be easier than bringing him back into the room. I don’t know I need help lol I already get so emotional thinking about not having him in bed with me. I guess I’m so used to having him in my personal bubble and his cuddles during the night that I’m not fully ready but I understand where my hubby is coming from.

Anyways if you got this far thanks lol any advice would be appreciated. I’d like to use a gentle approach if possible, the crying it out isn’t for me… 😩 I can handle 5 mins max lol