I like besalel’s advice.
But:
1)I disagree with your order. Following a heart which is not directed by the brain can lead to some pretty nasty consequences.
2)There is certainly a place in Judaism for analyzing such questions. They deepen your understanding, and therefore appreciation, for your beliefs. I agree that one should not attempt to use them to guide their life, because you cannot know where you are truly holding, and how those principles apply to you.