Two quick oatmeal options, are, first overnight oats. Basically you're mixing them up the night before with cold ingredients, let sit in the fridge all night, eat cold or microwaved in the morning.
Our quick morning prep is to put regular old-fashioned oats dry into a serving bowl, add sugar, and add boiling water in amount just scant of amount of oats. We usually do 1/2c oats, 2t sugar, scant 1/2c boiling water. Stir and let sit for a minute. Add raisins, dried strawberries, frozen blueberries, etc. we also add a generous pour of heavy cream for creaminess and fat to keep them full. My 9-yr old can do this by herself in under 5 min. One bowl, no pot to wash.