It's really not that big of a deal. When i was young my mother used to say "no one will marry you if you cant cook." I had a rolling pin when i was 5. But now i realize, she was wrong. Cooking is easy and its important but it's not the basis of a marriage.
Anyway, you just have to learn the basics and you'll have enough knowledge to move on to the harder stuff. Don't stress yourself. My bhabhi didn't know how to cook because her mother didn't teach her either, when she got married, my mom taught her everything and she enjoyed it actually. It brought them closer.
Ironing doesnt require any "knowledge" and cleaning is easy as well. Just watch cooking shows/ask your mom to teach you a new dish every week. My friend is getting married next October and ive been helping her learn since her saas is a bit crazy about the cooking part. I guess it depends on the house you marry into. If your saas is understand then its fine.