In 1986, Marwan enrolled in the University of Saint Espirit Kasslik in  Lebanon. He studied piano and harmony there and during his university  years, and he won a prize in a music  composition contest.  The award was  presented to the singer by former Lebanese President Amin Joumayel in  the following year. In 1988, Marwan produced his very first album Asak  Habibi depending solely on himself in writing the  lyrics and composing the  songs, and of course producing it. The album was not that big of a hit   unfortunately.Marwan started a new phase in his life in 1989, but not as a s inger. He performed in  various variety shows, such as Aghani Aghani and  Studio Al-Fan, on the keyboard. He continued as a  keyboard player till  1996 and played with many famous bands; like Sabah's band. But during  that  period, Marwan was able to come up with a single, Fik Yamma Balak. It  was released in 1994 and  established he as a talented singer. He then went  on to lead Wael Kfouri's band as well as other  famous Lebanese singers as  before. This gave Khoury the chance to see the world and go on tour as  a  conductor.