I am a first time Mom, too, and all of the eating transitions can be very confusing! I love our pediatrician, and the feeding suggestions she made for us have worked very well, so I will pass them on in case you are interested. She told me that my son should be eating four meals a day. A typical day on our routine looks like this:
Breakfast:
oatmeal
fruit
6 oz. cup of formula
Lunch:
chicken
steamed carrots
6 oz. cup of formula
Snack:
4-6 ozs. of water or formula
small serving of pomegranite applesauce (optional)
Dinner:
Chicken
spinach
rice
4-6 oz. cup of formula
You can reverse the snack and dinner if you like to give your baby formula/breastmilk before bed. She said she wanted our son to have 16-20 ozs. of formula/breastmilk per day and 4-6 ozs. of water per day. My son doesn't really like the water, so we are working on it. Anyway, I don't know if this helps, but it has been great having his meal times more in sync with ours. I feel like I get a lot more accomplished. Good luck!