Mormons: is it true you have secret handshakes, secret hand signs, secret names, think Satan is Jesus' brother?

believe God was once a man and we can become like God someday with our own planets, that God lives near some star called Kolob (spell that backwards and what does it say - was that an inside joke), wear underwear with Masonic-like symbols on them, that we have a spiritual Heavenly Mother as well, that black once were denied the priesthood because God cursed them with dark skin but that he changed his mind in the 70s?