I think Lyon is at 500k, maybe Lille and Toulouse as well

In France, except Paris and Marseille I don't think there is a city over 500k. But the city system is not the same everywhere.

We both are too used to the our lifestyle, We dont know what it's like to live in a totally different world that the one we're used to

I would lose my mind if I lived anywhere with less than like 500k people. I do get the appeal of smaller settings though, everyone's got their own preferences and day-to-day needs in life

Except for the proximity with everything, is it better to live in a city or a village?

I spent my whole life in the same village, but I was born in a 45000 city, the biggest in the area, but the city is really, if you compare it to a belgian city which can be 5 timee bigger for the same amount of inhabitants.

It really depends. I've lived in Singapore for a while and that is almost 6.5m people in the same area that my 2m city has. Still it felt less dense because of good city planning.