This textbook provides a self-contained basic tutorial to help readers confidently understand and comprehend the fundamental element of quantum computing, that is, the "quantum state (spin) represented by the Bloch sphere." The primary target audience includes readers from information technology or business fields who are entering the quantum computing domain without prior experience in physics courses. Additionally, the content is designed to be a valuable refresher for those already familiar with physics or those teaching quantum physics. This volume overcomes the difficulties of existing quantum computing tutorials by providing a solution that demonstrates how, given a semester's worth of time, readers with a high school level of mathematics can be introduced to the concept of spinors without any top-down explanations.