I believe the best way to learn God’s law is to read about it in the Holy Bible King James Version yourself. You can even pray for guidance and understanding as you read and study. James 1:5
When a preacher or teacher says, “the Bible says…”, you are better prepared having read the Bible to verify that statement. Don’t be afraid after Church to ask for a direct verse if you have a question about one of your pastor’s points. Send an email or make a phone call. They may even appreciate your interest.
There is a lot of errant doctrine out there and ultimately you are responsible for your own salvation.