Searching for Place to Live - New American Student at Uni Heidelberg starting WS 2019

I am a new American student starting my Masters at Uni Heidelberg at the Center for American Studies. I am a 25 year old male. I have spent the last 2 years of my life teaching High School in central Illinois. I am looking for a Shared flat 9SIngle room) or a single room flat. I am able to pay approx. 350 Euros a month. I will be arriving in Heidelberg on October 6th, 2019 and would prefer to have a place to live before I get on the plane.

I am an active and engaged individual who is excited to begin my 2 year journey in Heidelberg. I will hope to use it to better myself as a teacher.