Regarding “falling from Grace” true or false, or whether or not I, too, am saved... still working on it.
My general opinion after reading the material has been that, the Father will let us go, giving us over to our own delusions if we’re stubborn enough about our truth outranking His.
Jesus, on the other hand, never stops knocking on our door. He never gives up on us, no matter what we’re doing wrong.
The Trinitarian thing gets confusing.
I sense part of the problem is “reading the material”. What material??? There is a lot of garbage out there these days about people sprewing out fake and phony doctrine. While this might sound a bit harsh, I would refer people to the Apostle Paul who, in 2 Timothy warns us about such things.
I would suggest reading and understanding the book of John. John tells us he wrote “these things” so that you might believe in the Son of God and believing you might have life. I can think of no better author.
Jesus told Phillip (John 14) that if he had seen Jesus he had seen The Father, for He is in The Father and The Father is in Him. All a human can see of The Father is where The Father intersects our spacetime limits well. God told us before Jesus was made flesh and dwelt among us that the name for Jesus is God with us, ‘Emanuel’.