Commitment to Judaism

Hello, Your Honor.
I wanted to ask an opening question following reading a number of answers on the site. So, assuming and convinced that there is an intelligent being in a different dimension who planned and created the world, what would oblige me as a Jew to act as a Jew? After all, we would also have to prove the status of Mount Sinai, and describe what exactly happened there. I would be happy if the rabbi would address the matter.