If I try to be a good person, won’t God accept me, even if I don’t believe?
That is the wrong question: God has already accepted you. The question is: will you accept him?
God has reconciled himself to you. What does that mean? It means no matter what you have done, God isn’t counting it against you. He isn’t remembering it.

It means nothing you have done can keep you from God: pedophilia, incest, abortion, murder, rape, drugs, alcoholism, addictions, fornication, adultery, lying, cheating, pornography, witchcraft, stealing, racism, hatred… anything you can name, the most evil thing you can name. Even child sacrifice and worship of satan.
NONE OF THAT MATTERS TO GOD. He has accepted you.
Will you accept HIM accepting you??