Help with my situation sil vous plait!

Hi everyone,

I'm an Australian with a French girlfriend of one year that has recently moved back to France (Rennes).

I will be going to france in July with the intention of staying a year (or more) if possible. My question is what visa should i be applying for?

As an Australian i can apply for a working holiday visa which allows me to stay for a year.. I would definitely like to get some kind of work but my main purpose is to be with my girlfriend. Would this be acceptable to say when applying?

Or should i be applying for a long stay visa? or perhaps PAC's?

Any info is really appreciated !!