20 year old student looking for accommodation in Paris (September-December)

Hey! English theatre student here, lucky enough to be on placement with one of the international schools in the French capital for three months! I am looking for somewhere to stay for that period. I am friendly and clean (almost obsessively) and I always take care of the things that need it (plants, pets, etc.). At the moment I am writing this ad, no arrangement is a bad arrangement but my maximum amount stands firmly at 500Euros per month. Looking forward to hearing from you! :)