Girls, please share your experience on how to wean children from sleep...

Girls, please share your experience on how to wean children from sleeping in arms? From birth, he sleeps in my arms, then I transfer him to bed. We're GVB, eats exclusively at me on his hands and only from the left breast, lying awkwardly for him, my chest is small. Now he's already heavy, impossible to feed while walking around the room, I want to stop breastfeeding in arms but don't know how. He has tantrums, I have tantrums, then pick him up, feed him and sleep. But I have no more strength, I'm on the verge of a breakdown.