Presdestination is against God's nature. He wouldn't create something and comdemn it for it's nature. That would make God a respector of persons. It's a man-made theory that is way off.
As far as salvation...why not just do all that the New Testament tells us. Believe, Repent, Confess, Be...
I know of a detailed article on this subject that has helped many make their own conclusions for this issue. It's at http://www.gracecentered.com/haveifallenfromgrace.htm
I thought it might help.
You'd have to have help to misunderstand what the Bible says about baptism. It is so clear. In Acts 2:38 Peter commanded that we "Repent and be baptized for the forigiveness of sins."
Jesus said in Mark 16:16, "He that believes and is baptized shall be saved."
Those who make statements such...