Feeding Baby Lovebird. Can I gv it raw or do I need to cook first?

I have a baby lovebird about 1 mth old. If I were to gv him carrot, do i need to cook it first or give it raw? How about other vegetables? How often and how much does he need to be fed in a day? I am still hand feeding him with baby food. And now, trying to introduce him to new food. He doesn't seem to like mangoes though.