As someone pointed out, you are in Pakistan, and Google requires that you have a six-month-old, established web presence in order to apply from that country. Read the AdSense terms of service for your home country and especially review what Google does not allow.
It would be best for you to spend the next six months making several dozen Hubs, at least. Read the Learning Center here and follow the recommendations for best practices and building strong content. Then after six months, apply for AdSense. You will need acceptance to that program before you can join HubPages' own ad programs here.