I'm looking for a room in oxford

I'm looking for a room in a flat or house to share.

If someone is looking for a partner to let me know since I am not lucky to find the room by myself the majority I have seen are from real estate agencies and I do not like real estate agencies I prefer to deal directly with the owner. Or if you know a web page where you can search for rooms. Since the first week I would stay in a hostel in Oxford. But after that, I would need a fixed roof.
It would be a great help if someone knew something about someone looking for companions or someone who rented a room that is not real estate but directly with the landlord.

Thanks greetings to all.