Le Marais district is a great place where to start your adventure in Paris. May you be interested in history (one of the oldest district of Paris), museums (Centre Georges Pompidou, Picasso museum), shopping or enjoying French cuisine, the district has a world reputation for all of those !
I propose you to stay at my place while I am away. This is a 18m² studio located on the fifth floor of an ancient building (no elevator). Its orientation makes it very light during the day and quiet during the night. In the main room, you will find a bed/sofa, as well as a few closets. The kitchen/bathroom is pretty narrow but well-suited for all your needs. Toilets are located on the same floor. Of course, you will be able to use the Wifi, fridge, etc. Clean towels and bed sheets will be provided during your stay.