Thank you Chris for your answer and for the article.
To be honest I never really took care of my diet. I used to a very skinny guy, now I am a lightweight fatty or something like that. I have trouble eating correctly, end up doing microwave meals, with 2 or 3 "cheat" meals like pizza or fries + meat.
I went to a nutrionist who said I had not "too much fat" but "not enough muscle". Even if I used to practice sports like basketball, tennis, in the past, I seem to lack at least 3 kgs of muscle, that's what he said after a body composition analysis.
I lifted on and off in the past, built a bit of muscle, but now I feel on a downward spiral and I want to take action... I spend too much time reading articles etc...
That's a family thing also, all the males from my family have little to no muscle, I would like to change that and I know after some time it will be much more difficult to build mass.
Lung infection is better now, and I will start again saturday, I don't know what to do precisely and will try to figure out.
Maybe a coach was a call for help or motivation, I don't know. I am still thinking about it.