Thank you for your question. Although you may be satisfied with authentic reports (perhaps not all at the level of tawatur) to construct your framework of belief, it is more common to start from an intellectual starting point. Aqaed is generally taught through a number of intellectual proofs for the existence of God, followed by an intellectual discussion on His Attributes in the light of the scriptural sources and then proofs for Prophethood, Imamate and Resurrection. At the same time, religious experience plays an important role in reaching certainty in what one believes. In short, a combination of the scriptural sources, the intellect and religious experience that contribute to the framework of belief. This is why taqlid is not required when it comes to belief.
May you always be successful