What part of SoCal are you in.
But now, we embrace our spiritual differences. I know people should not get married if they can't accept each other as they are.
If you are all sealed together, you will be together forever in the Celestial Kingdom.
Yes, talk talk talk about everything yoiu can think of, but beyond that I would suggest pre-marital counseling from people knowledgeable in each tradition at play this will probably take two different counselors, who might be faith-based.