How can I start anew and rectify my life, especially since I feel deficient in my knowledge of my religion?

To return to the path of righteousness after straying, it is recommended to learn the obligatory duties and avoid the forbidden acts, to join a Quran memorization center, and to associate with righteous women. It is also advised to regularly read the Quran with contemplation, seeking assistance from a concise commentary such as "Zubdat al-Tafsir (definition)," to maintain the prescribed daily remembrances from "Hisn al-Muslim" or "Mukhtasar al-Nasiha," and to frequently supplicate during times when prayers are answered. It is suggested to acquire and read books such as: "Al-Iman" by Dr. Muhammad Na'im Yasin, "Al-Mulakhkhas al-Fiqhi" by Sheikh Salih al-Fawzan, "Zubdat al-Tafsir" by al-Ashqar, "Riyadh as-Salihin" and "Sharh al-Arba'in an-Nawawiyyah" by an-Nawawi, "Mukhtasar Minhaj al-Qasidin" by Ibn Qudamah, "Nur al-Yaqin" by Sheikh Muhammad al-Khudari, and "Al-Da' wal-Dawa'" by Ibn al-Qayyim. Finally, strive to read these and other books, listen to Islamic audios, and attend lectures and seminars.