Searching for a wg

My name is Baye (and friends call me Baya). I am a DAAD scholar from Ethiopia and graduated from the University of Heidelberg in International Health last week. Following my graduation, I have to move out of my flat, at the studentenwohnheim in Heidelberg, on September 28, 2018. 

I am looking for a WG or a single room in Heidelberg or any other cities around like Mannheim (I am open to recommendations). My budget is 300 max. warm. 

My target is to learn the German language; My level is A2 now and I really want to work on that. I like watching soccer games, love listening to music and like going out. I enjoy conversations, very much interested in other people's stories and I like to cook Ethiopian dishes.