If you want to use AndroidAPS, I recommend getting on an AndroidAPS discussion group. (This one is OpenAPS.)
You're decision depends on personal preference: you can loop with Omnipod, but you will not use AndroidAPS then, but Loop on iOS with a RileyLink. When choosing AndroidAPS, there's mainly two pumps supported in Europe: Roche's Combo and Sooil's DANA R(S). Both should be available in France, but from German discussions I heard that people decide most often for the DANA RS pump, as it is best supported by AndroidAPS.
The simple way to find help is to head to the French Looped Group on Facebook.
Sent from mobile, please excuse tone.