There are two critical questions for a person to answer before they explore Christianity:  1.  Was Christ God.  2.  Did he rise from the dead.  Everything depends on the answer to those questions.

If you answer 1. Yes,  and  2. Yes, then it will change your life, because you will start your journey towards finding out what God expects on your part.

Remember, Satan himself answers "Yes" to both of those questions, but is not saved from eternal death.  There is more involved.  Satan knows God exists.  He knows Jesus was God.  He knows that Jesus rose from the dead.

James 2:19  "You believe that there is one God; you do well: the devils also believe, and tremble."

So what is it then?

Repentance.  And surrender.   Mark 2:17  "Jesus...said unto them, They that are whole have no need of a  physician, but they that are sick:  I came not to call the righteous,  but sinners unto repentance."

Some people are part of a religious body that confesses their sins,  but keep doing the same thing over and over again.  Confession is not repentance.  Repentance means you change your behavior permanently.

Surrender means you give your life--all of it--to God, to do his will.  When that happens, God, the Holy Spirit, comes to live within you and changes you into a new person.  The Bible calls it being "born again."  It is a new life--very different from the old life.

"I am crucified with Christ:  nevertheless, I live; yet not I, but Christ lives in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me and gave himself for me."  Galations 2:20.

Don't confuse surrender with some "feeling."  It is an act of the mind and heart.  Feelings come and go.  You can't depend on your feelings.