California mother & son interested in subletting in Paris. Any advice?

I'm hoping to spend several months in Paris & was wondering if anyone can point me in the right direction. My son who'll be 18 & I are artists from San Diego. We're planning a to rent a flat in Paris starting around January. (Very flexible about dates). I am 53, a homeowner, tidy & very responsible. Any suggestions for a website where I can find an apartment to rent? Thanks in advance!