I confess that I'm not at all comfortable with the truss rod! : /
I searched dozens of tutorials on the internet but I do not really understand.
I know that my handle is convex, it's not really hard to guess (The first strings do not even ring because they touch the band, even empty but the last strings sound pretty much), but in what direction?
I am told to turn counter-clockwise, but in relation to which axis? Currently I turned a quarter of a turn from the right if we place on the side of the body as in this picture:

Is it good ?
Do you have any advice for me?
Thank you