My fiancee and i were suppost to get married, but didn't have time to before he deployed out. but he gave me?

a general power of attorney. i was wondering if i could go get our marriage license with that? i live in Okla. also, i am 17. won't be 18 til dec. he will be back around oct or early nov. he was wanting me to go get a home for us set up back in cali where he is stationed. will they allow me to do this with the gen. poa???