How much Oatmeal cereal is enough?

Diana

Baby Boy wasnt going to start foods until 6 months but now I am going to start him at 5 months (in a day or two away). I changed my mind because he is constantly looking at my food while I eat and cries when I finish and tries to suck on my hand as soon as I'm done eating. He also has his 2 bottom teeth poking out now...

I'm not sure how much Oatmeal cereal I should give him starting out with... How many teaspoons or tablespoons in how many ounces of milk. Not sure if it makes a difference in mixing but I'm EBF, do I need to warm up the cereal? Any feeding advice is welcome.