His musical education began with lessons in guitar, piano, and singing, eventually leading him to Christian David Rheber in Dresden, where he studied counterpoint, music theory, piano, and since 2011, composition. He then attended the "Paul Hindemith" Music School in Berlin-Neukölln, where he was part of the preparatory program in composition from 2013 to 2016. From 2016 to 2024, he studied for his bachelor's and master's degrees in composition under Prof. Hanspeter Kyburz at the Hochschule für Musik "Hanns Eisler" in Berlin. Additionally, he completed two semesters abroad, one at the Sibelius Academy in Helsinki (Prof. Veli-Matti Puumala) and one at the University of Music and Performing Arts Vienna (Prof. Detlev Müller-Siemens). During his studies, he took classes with Prof. Jörg Mainka (analysis), Prof. Dr. Dr. Benjamin Lang (harmony/music theory), Prof. Wolfgang Heiniger (electroacoustic composition), Eres Holz (algorithmic composition), and Torsten Herrmann (instrumentation/orchestration). He also participated in workshops and summer academies (Impuls Academy, Graz), where he attended further seminars and individual lessons from various composers from Germany and around the world, including Prof. Stefano Gervasoni (CNSMD Paris), Prof. Mark André (HfM Dresden), Prof. Lucia Ronchetti (Conservatorio di Musica di Salerno), and Prof. Clara Ianotta (mdw Vienna).

René Kuwan writes pieces for both professional musicians and for young musicans and ensembles. His compositions have been worked on and performed multiple times by young prize winners at national and international competitions, such as Jugend musiziert and the German Music Competition. Additionally, Kuwan is active as an arranger of classical music. Impressions from his travels and his intercultural interests have also led him to compose for instruments that are not part of the Western cultural tradition.
His works have been featured at national and international forums for new music, including Impuls Festival, Graz, Austria | Klangwerkstatt Berlin | Daegu International Contemporary Music Festival, South Korea | Jeju International Contemporary Music Festival, South Korea | Alte Schmiede, Vienna, Austria| Festival for New Music Lüneburg | Unerhörte Musik, Berlin | Zepernicker Randfestspiele, near Berlin| Elbphilharmonie Hamburg | Musik- und Kongresshalle Lübeck| Haus der Kulturen der Welt Berlin and the Temppeliaukio Church (Rock Church) in Helsinki, Finland. He has collaborated with ensembles such as the IEMA Ensemble (International Ensemble Modern Academy), Platypus Ensemble, Quatuor Diotima (reading session), Helsinki Symphonic Brass, Ensemble Zeitkratzer, Trio Klangspektrum, georg katzer ensemble, and others. His pieces have also been produced on CD and broadcast on Deutschlandfunk Kultur, Südwestrundfunk (SWR), Rundfunk Berlin-Brandenburg (RBB), and Österreichischer Rundfunk (Ö1).