Concerning who is God, and Jesus, and Satan, this is something I wrote to a LDS member who told me this was correct:
All spirits are from the Father, all the same, all eternal. Some follow God, and some do not. The pinnacle of those following God is Jesus Christ, who follows God fully. The worst case is Satan, who follows God nothing at all. And the rest of us fall somewhere in between.
Following God fully means Jesus is as God is, because His heart and mind is completely towards the Father, so He shares in the Godhead.
As we follow God, we will also share in unity with Him, though not in the same fullness as Jesus, as we do not follow as fully.
This part is more a summary of what I was told:
All spirit are eternal, all the same. The spirit that is the most "Godlike" is whom we call "God", and the second most godlike we call Jesus. The very least godlike we call Satan.
God is not God because He's of "different stuff" than us, or a different kind of being, rather, because He is the very most loving, faithful, etc., of all of us, as we are all the same kind of being. This includes the Holy Spirit also, a spirit just like us, only, more like God, or rather, more like the spirit in the ideal state we understand as God.
To any LDS member, I'm absolutely open to correction if I'm misrepresenting anything.
Much love!