Room in shared apartment

I am Anas, I am going to complete master at FH Dortmund university in Electrical Engineering, I am very interested in finding a good apartment (private room in shared apartment )in Dortmund area not necessarily too close to FH Dortmund however I prefer to be 15 ~ 20 min walking or 30 min with public transportation. I am so open and respect others. I would like to participate with mates , I prefer non-smoking peers, I would like to get to know them and engage. Please if there is any available place contact me via my whats-app, telegram or email