Transitioning to bassinet from co sleeping

I am currently trying to transition our 10 week old bub to his bassinet as he has co slept since he was born (not by choice but because it was the only way we could get some sleep). Does anyone have any tips or advise for me? It is only the first night but only getting a few minutes of quiet between each cry/unsettled period. I am finding it excruciatingly hard to have him in there, let alone letting him cry for a bit. Hubby works away so it's been me and bub together 24/7 so i think I've got a bit of seperation anxiety even though his bassinet is in our room still (he's normally asleep on me in the lounge until i go to bed) 😢😢 I feel like I'm not ready to have him in there but I know I need to do it