Hello @gmar, you can have a look in this list : How to contribute to YunoHost
There is also some video arround the corner: Yunohost Cinema
I’m planning some “user experience” testing like “You have this server and you should install Yunohost on it” or “Here is your Yunohost serveur, do a backup”. I’m so used to yunoHost that I don’t see anymore all the edges and small traps. The goal is have something smooth and usable by “non technical” people. At least, that’s how I see it 