I'd go with a vegetable and then a fruit, etc. (Since you are waiting a bit between them anyway). Also, if your Dr. said to go ahead and start, then I would do so. Remember - we enjoy variety and a baby will too.
My funny story is that I always had to pack TWO jars of babanas when mysister watched my son, one for her and one for him, or he didn't end up getting any! She just never got over loving the banana baby fruit...