In fundamentalist Christianity you’re taught that being a good person doesn’t matter unless you have a “relationship with Christ”. And that if you don’t have a relationship with Christ, as defined by church doctrine, you’re likely going to hell.
But that is the opposite of the truth. What matters isn’t what you believe about a historical figure (though Jesus is someone to be admired and emulated). What matters is love. What matters is how you treat others.
If you love others, you know God. Period.