OH GOD.. this was such an issue with my husband's family. They eat three times a day... proper meal. me on the other hand... just once. Whatever I do cook, it ain't that bad. I enjoy cooking and like Hareem said, do watch cooking shows and have recipe books. There is tons of stuff online actually for you to learn from. But ok so my husband is extremely picky about food but I constantly tell him its not nice to complain about food because first I put so much mehnat cooking it and second at least you have food on your table...
He has learned not to complain "too much" but when his parents came.. i can't tell you how much lectures I got for not cooking three meals and not cooking good enough food. Like I said I do cook good food but because t hey are from a different background their food is cooked a certain way that is different from mine.
Just do your best and I am sure if you tell your husband that you are willing to learn and will do your best to make good food for him. Tell him that you are really looking forward to be with his mother who can teach you how to cook. There.. your problem solved. You praise his mom... you tell him you'll learn from her :) He'll be a happy man.