1st of all , there is no Trinity.
Jesus is the One and Only True and Living God. He is the incarnation of the eternal Word and Holy Spirit who are 1.
2nd of all , Christ died once for all mankind for all sin.
3rd of all , those who RECEIVE the gift of Eternal Life are saved.
4th of all , those who REJECT the gift of Eternal Life experience Eternal Death.
5th of all , you need to stop listening to men who are not Spirit Filled. Such revel in error because it came out of their own pridefull intellect.
6th of all , you need to be baptised with the Holy Spirit.
7th of all , you need to read the Word for yourself and allow the Holy Spirit to teach you.
Blessings as you move into Truth.