First of all, a big thank you to @oshpark. I heard plenty of good things about them, and for a first experience, I'm really satisfied ! The boards took exactly 20 day from the kicad file upload to my french mail box, and the quality is spotless. Very nice, keep this good work really !

After ordering the board, I was a bit worried about a via a bit close to a track:

But it went very well !

I populated one board and stick it behind the LCD screen as I planned. That's why I put the components only in one side, even if as a counter part the board is larger.

Next step is to make a nice frame/case and make two new instance !