S.H.
I think my daughter started grabbing the spoon out of my hand when she was like 8 months old! haha She would grab it from me and would insist on trying to feed herself. So I just helped her the best I could and let her start learning.
Has your daughter tried taking the spoon from you or shown any interest in wanting to use the spoon herself? If she does, let her try it out! She will make a mess, but that's how they learn! :)
My daughter is very independent. When she shows interest in wanting to do something herself, I let her go for it! I think that's the best way to know when they are ready for things.