Re: moving to pakistan to live with in laws
First thing, not everyone cooks in Pakistan either. A lot of people have cooks and maids to do the daily tasks. Like you stated, your in laws are very nice and supportive then I am sure they'll have no problem in hiring someone to help you out. Though I strongly believe that every girl should know how to cook. Not saying professional cooking but enough to at least serve few people when there is no other option.
You can talk to your husband to be and tell him that you don't mind learning but the learning process may take some time. In the meantime your in laws can find maids and cooks to help you out. Like I said before you should learn few dishes at least if not everything.