What a great opportunity you have to learn, WITH your family!I've always liked cooking, but having my children grew that. Our son LOVES to help out, play cook, etc.Start small - if you're eating take out every day, make it a goal to cook once a week and go from there.
There are SO many resources on the internet for toddler friendly meals (although my 2 year old also has days where all he wants to eat are bananas and goldfish cracker, choose your battles I suppose)
There's a free course from Standford - https://www.coursera.org/learn/childnutrition
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Edit: I JUST realized you weren't specifically talking about yourself. My bad! My point still stands, if someone DOESN'T know how to cook there are so many ways to learn