Cook and feed yourself as you do it for your kid

In the aeroplane stewards, every time say if the masks fall first put to yourself and then put it to your kid. It's hard to swallow this but you are more important than your kid(till 16-20 years old) And if you find time to feed him, if you find time to cook for him you have time to cook for yourself. Start small and start to organize yourself. if you start to organize yourself to cook for yourself and feed yourself properly you will start doing the same thing in another part of your life.