So would someone that has never heard of airplanes before learn quicker than someone who has thousands of hours of sim behind?
At the risk of being more outspoken than the wise
I'd answer that with "most likely, yes". As said, the simmer will first have to "unlearn" many things acquired, before learning can begin.
went for the Roger Sommer aeroclub
Cheese us! That's at LFSJ Sedan-Douzy, right? Two hours' stiff driving from Brussels? Excuse me for becoming more and more sceptical. Yes, the hourly rate for the plane may be cheaper, and the French have a strong tradition of disciplined training, believing very much in self-control. But will the difference in rates make up for the road trips? Including those wasted because of suddenly inclement weather, plane broken, instructor ill, runway closed due a visiting family of boars, &c &c?
Also, be aware that a PPL gained in France may allow you to fly in Belgian airspace, but like as not you will learn the radio in French which is neither legal nor practical in the rest of Europe - Belgium included. Get the facts straight before spending money!