I got a bunch of the gerber 1st foods. Try only one food at a time for a couple days just invade of any allergies. As for the amount I just kept feeding my son till he didn't want anymore

I started with carrots at four months. Every week we tried a new veggies after veggies where established I introduced fruit baby food.

If you get the gerber rice cereal it has directions on the back for "baby's first feeding"

We are doing baby led weaning, meaning that rather than doing purées or cereal we will offer baby small bits of avocado or sweet potato that he can feed himself. Once he is really interested in eating and his tummy has gotten used to digesting avocado and sweet potato we will start giving him whatever we're eating, just cut up into manageable pieces.

My son is not quite ready yet, but in the next month or so I will start introducing food. You are supposed to start with single ingredient foods in case they have an allergic reaction. Some people prefer to start with rice cereal or oatmeal prepared with breastmilk or formula, and avocado or sweet potato are other popular first foods. You can start with food once or twice a day in addition to their normal feedings of breastmilk or formula. You will see pretty quickly if baby is ready or not