To what extent is it true that reciting Surat (Ṣād) once daily will subjugate all creatures and the world, fulfill dreams, and make matters easy and smooth from the very first days?

It is not permissible to attribute a specific blessing or special benefit to a particular Surah except with evidence. Nothing has been authentically reported from the Prophet (peace be upon him) regarding the virtue of reciting Surat Sad. Whoever desires reward, ease, and success should cling to Allah, recite the Qur’an with contemplation and action, and follow what has been authentically reported from the Prophet (peace be upon him) concerning deeds and invocations for relieving worries and attracting sustenance, such as: sending blessings upon the Prophet (peace be upon him), adhering to seeking forgiveness, and increasing in prayer. Increasing the recitation of the Qur’an in general brings goodness, for the Qur’an is a healing, a mercy, guidance, a blessing, and a light.