What is the central creed of Islam? What are the fundamentals of belief?

Answer some of these questions with the readings which i will include below.
What is belief? What is the relation between belief and practice?
What is the central creed of Islam? What are the fundamentals of belief?
What is shirk?
What is ahadiyya, wahidiyya? What is meant by the term “continuous creation”?
How is God described in the Muslim tradition? How does Turner’s text improve your understanding of “Beautiful names of God” reading? Do you see any of the above concepts, which are noted in Turner reading, expressed (directly or indirectly) in the “Kun” reading?