18 month old acting out after new baby?

I understand it’s normal, I understand it’s hard for him. I have already tried giving him one on one time and a million other things.

The one thing that’s been extremely hard for me is that he’s refusing to feed himself. He had just started before our other son was born and he usually loves trying, he even kept on liking it up until a week ago (our other son is 2 months old).

But then he started screaming and handing me the spoon, if I don’t help he sits there shrieking and having a tantrum. The problem is normally I’d help but in the mornings I’m breastfeeding, I’m still getting the hang of it and both hands are occupied. The second I move my hand to feed him my other son unlatches because I’m not supporting his head or holding the breast to his mouth.

What am I supposed to do? It’s getting so damn hectic.