Ask someone to define what a good person is, and it's unlikely he'll admit that he never thought about it. Similarly, it's hard to admit if we've never considered whether there is a God, and whether He spoke at Mount Sinai. Or to admit that when it comes to free will, we've been using it and we don't know what it's all about. Be flexible in your decision-making. Be open to someone bringing in another piece of evidence, and be willing to change based on new information.
Human beings make mistakes.
The biggest mistake is to decide that you're not going to change your mind. If you make a mistake and are too embarrassed to correct it, then you're making a second mistake. Don't make any decision you're not qualified to make. Go to others who know more. Respect their advice.