What is the correct order and progression for learning the religion, and what are the books that assist in learning the religion correctly?

Learning and gaining deep understanding in religion is a sign of goodness, for the Prophet, peace and blessings be upon him, said: "When Allah desires good for someone, He gives him understanding in religion." The best way for a servant to occupy his time is by gaining deep understanding in religion, especially regarding what establishes his worship, allows him to know his correct creed, and informs his daily dealings, due to the Prophet's saying, peace and blessings be upon him: "Seeking knowledge is an obligation upon every Muslim." For the optimal method of seeking knowledge and recommended books, you can refer to fatwas numbered: 98228, 105762, 41296, 123613, 122356, 126286, 121056, and 39219 to benefit from the advice for those who wish to gain deep understanding in Allah's religion.