Looks like you are applying for adsense first time. If you don't have any other site of your own where you will be publishing content you need to give your hubpages URL as the URL i.e give http://hubpages.com/@terrellvest7 as the URL.
You have just joined and you have about 3 hubs now. Google will not give approval for adsense for sites without "substantial" content. Focus on publishing more hubs, generate more traffic for your hubpages, resubmit again and you will get approval for adsense. It may not take six months and it can be anywhere between one month to six months. It all depends on how well you develop your hubpages and how it is viewed by Google.
Checkout my hub on the above topic below and also related hubs on this topic :