Young couple looking for a double room in shared flat or studio for 2 people

We are a young couple who will be spending in Lodz the next school year, We are looking for a double room in a shared flat or a studio for 2 people. We prefer a double bed instead of two single beds, but it would not be a problem if it is only single beds avaliable. In regard to the location, we would like to be near/in the city center (we will be studying physics, so a middle point would be considerated as well).