You can affect your beliefs by informing your mind. The Holy Spirit convicts of sin, but He also reveals truth and convinces the mind. Faith comes by hearing the Word of God. Read the Bible and God will convict and convince you if it is His Word and the Holy Spirit illuminates it.
Paul preached to the mind, heart, and will. Our faith has content. Apologetics makes a case for the Bible as the Word of God, the existence of God, the Deity/resurrection of Christ, etc. Many already believe in God. They just need to understand who Jesus is and trust Him alone. A child can do this without all the answers.
If you indoctrinate yourself in Islam, you could convert to it with your informed mind and will.
Once you have a minimum amount of light, you could give your life to Christ and then grow in detailed doctrinal and practical understanding of the Christian faith (discipleship). The Church has teachers to teach us doctrine and practice (orthodoxy/orthopraxy) as we grow in the grace and knowledge of Christ.
If you thought the earth was flat, you could investigate scientific proofs for round earth and change your mind/view.
Many atheists, including Antony Flew, follow the evidence and become theists. Others like C.S. Lewis move to a fully Christian conversion/position.
In any subject, we can change our views with new knowledge. We then give mental assent and finally trust it. Once we see that Christ and His claims are true (and the Word of God is revelation of spiritual truth from God), then we act on it and He increases our faith/knowledge over time. It does come down to faith, but it is based on facts, not presumption.
It is wrong to assume there is not sufficient evidence to believe. We are dead spiritually, so it involves yielding to the work of the Spirit in our lives. Rom. 1 talks about suppressing truth by our wickedness, truth about God that He has made plain.
We are preaching God/Christ. You must do something with it. Pursue it until you know that you know (either way), procrastinate, be indifferent, rebel, etc. The gospel is preached persuasively. Many believe and then see the light (we want all the answers before we believe, but God does not usually work that way). Many reject it despite it being true.
A Jehovah's Witness must indoctrinate a person over time with Watchtower literature for a person to become a JW. They read the Bible through the eyes of the WT. They think eternal life is taking in knowledge about God. The verse actually says that it is knowing God (vs about God). So, a true Christian can sense the Spirit's conviction and convincing, take a baby step of child-like faith and be transformed by the love and power of God in a moment. They have assurance of eternal life. A JW must study for an extended period, then get baptized, do door-to-door work, etc. and never know God, never have assurance, never have peace (it is a false cult).
Make sure you are talking about reasons, not excuses. The problem is usually moral, not intellectual (the evidence is out there for Christianity, but most want to continue living as if God does not exist....selfishly vs cost to follow Him).