@DanniS Thank you so much for the comment !
We took a plane from Paris to Figari (South Corsica) with Easyjet for 50 eur (with a luggage) !
At this Airport (figari) we rented a car for 120eur (for 1 week and 4 days… It’s very cheap I found)
And we stayed in a Airbnb which was perfect placed (15 or 30 minutes to all places you must see) if you want more info dont hesitate to send me a PM.
If you visit Corsica just one advice to really enjoy… Book yours holidays not at the main holidays of summer. The Girl who rent the airbnb told us that the road we took to go to another city from the airbnb in 15minutes, It’s 1 hour and half in the summer (jully and august)