You're waiting for MY help? Or was that a 'global' question? Have you browsed the other shared apartments offered here in this forum? I've seen a number of them in the past months. If you don't find anything before leaving you may have to wait until you arrive, staying at a hostel (called "hostal" in Spanish) for the first week or two while looking for paper postings of available, shared apartments.
Good luck! Saludos, MadridMan
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