Crib training..

Anyone have any tips for crib training? Once my son and I move again in Sept/Oct I will be getting a convertible crib for him. He has been co-sleeping since he was 3.5 weeks old (he had bronchiolitis and I was too scared to put him down to sleep). He usually has to be swaddled with a lullaby to sleep then I unswaddle him once he’s asleep. The most he’s slept alone is maybe 2 hours if that here and there. Maybe once he slept an entire night but I can’t remember.

Also how do you keep peace of mind? I just feel he’s so safe sleeping with me (NO BASHING) because I can hold him in one place so he doesn’t roll over. I’m so scared to not have him in bed with me and I have extremely bad anxiety and panic attacks 😞 so advice for me too please.