I would assume it's prelest, or a false vision at first. I've come to terms that i'm not worthy to see the face of God at this time of my life, nor will I likely ever be worthy.
That being said, if it's undeniably the Lord, I would ask what church I should join, what state/country I should live in, and finally ask for mercy on my atheist/christian-lite family, and pray all my ancestors, relatives, and friends would be in heaven. I pray for my salvation too.