Should I repeat my prayers from previous years because of the incorrect performance of the ghusl?
In the Name of Allah, the Most Merciful and Compassionate
The rulings of ghusl are not so complicated that one would conceivably perform it incorrectly and invalidly. Due to this, consider your previous ghusls valid and therefore your prayers as well.
The nature of water is that it reaches even hard to reach places, and a normal modern method shower would certainly achieve the minimum requirement of the ghusl. [Tahtawi/Shurunbulali, Hashiyat Maraqi al-Falah]
I would advise you to take the level one Islamic Seminary Courses offered here at www.seekersguidance.org/courses – this will greatly help you remove any confusion and ambiguity in the Religion and afford you a balanced understanding that will facilitate practice.
Hope this helps
Allah knows best
[Shaykh] Yusuf Weltch
Checked and Approved by Shaykh Faraz Rabbani
Shaykh Yusuf Weltch is a teacher of Arabic, Islamic law, and spirituality. After accepting Islam in 2008, he then completed four years at the Darul Uloom seminary in New York, where he studied Arabic and the traditional sciences. He then traveled to Tarim, Yemen, where he stayed for three years studying in Dar Al-Mustafa under some of the greatest scholars of our time, including Habib Umar Bin Hafiz, Habib Kadhim al-Saqqaf, and Shaykh Umar al-Khatib. In Tarim, Shaykh Yusuf completed the memorization of the Qur’an and studied beliefs, legal methodology, hadith methodology, Quranic exegesis, Islamic history, and some texts on spirituality. He joined the SeekersGuidance faculty in the summer of 2019.