Sleep training

Hi mamas !!

My son is a little over 6 weeks .

He was a NICU baby was there for 3 weeks . When we brought him home I couldn’t help it but to carry him in my arms 24/7 I’m also breastfeeding so he’ll fall asleep in my arms and I’ll just hold him . I just wanted to love on him and comfort him as much as I could . He has a bassinet which we keep on the side of our bed . But only sleep in a hand full of times . He sleeps fine if he sees me next to him in our bed . The min he falls asleep and I try to move to bassinet he wakes up ,😣 even though I love him sleeping with us . Me and my husband sleep very uncomfortable I know in the long run this will be as night mare to brake from . I’ll love him to learn to sleep on his own with out me being next to him . My question how do I brake this ?! We’re do I start . Is he to young ??