The six articles of faith in advance details.
Belief in God and tawhid (monotheism).
Belief in the angels.
Belief in the Islamic holy book.
Belief in the prophets and messengers
Belief in the Last Judgment and Resurrection
Belief in predestination
Oneness of God
Justice of God (Adl or Adalah)
Leadership (Imamat)
99 names of Allah in details.
And Hundreds of more topics in details.