When I repented and the Holy Spirit entered into me, it was a very simple to understand happening. It is not a process for it seems certain that for each person it is individual, the the motive is the same for all.
It was quite simple: while walking across the University Quad, I was talking *praying( to the Father saying, " Wow, man is evil. Man is so evil. Oh is he ever evil. Hold it! I am a man. Wow, You are It *it meaning all and everything here(.
Suddenly everything became Light and the Light entered into me. I had turned from believing in this age to believing God.
It was wonderful, and there is no single formula for this for each person has his own need and manner of understand. When the Holy Spirit enters into each of us, we simply know we are with God and never again with this age.
Perhaps this is understandable to others, I do not know, but to realize we are all sinners, not perfect in ourselves only, and turning to rely on the One who Created all that is, we are repented, I believe e.