I would take all advice with a grain of salt.
Does your daughter have any teeth qt 9 months? I can't imagine eating plain cereal without actually being able to chew it, so use your common sense and don't give things she can choke onor is unable to taste fully without chewing them. babys tastebuds are not developed yet so let her lick, pick, touch, play with, smell, just like you would if you fell on a deserted island and see food that you never encountered before.
Introduce and follow the lead, all kids are different.
My son is 3 and he eats raw broccolli loves it, I am baffled, but he won't eat other plainer foods.