18 year old student, looking for accommodation in amsterdam

Hey! I am an 18 year old student, planning to study in Amsterdam. Therefore I am looking for a room or an apartment. I am not opposed to sharing facilities with a roommate but I also do not have a problem with living alone. I'd be very happy about any kind of offering, since finding accommodation in Amsterdam is not very easy. My studies are starting in september but I am planning on moving to the Netherlands in July or August. So if you know about something available from that point for a period of over a year please contact me!