The God of Abraham, Isaac, and Jacob graciously gave the Law of Moses in order to teach us how know Him by embodying His character traits. For example, the Law of Moses teaches us how to be holy as God is holy (1 Peter 1:16, Leviticus 11:44-45). The Son is the radiance of God's glory and the exact likeness of His character (Hebrews 1:3), which he embodied through his works by setting a sinless example for us to follow of how to walk in obedience to the Law of Moses. So does the God that you believe in have the character traits that the Law of Moses was graciously given to teach us how to embody? If so, then your goal should be to know Him by embodying His character traits through following Christ's example of obedience to the Law of Moses. However, if the God that you believe in has different character traits than the God of Abraham, Isaac, and Jacob, then the God that you believe in is not the God of Abraham, Isaac, and Jacob.