Hi @Someone ,
If you want reinstall step-by-step from Raspbian Lite, first ask for domain recovery if you have one depending on YunoHost (e.g. : .nohost.me ; .noho.st ; .ynh.fr) Nohost domain recovery - Suppression de domaine en nohost.me, noho.st et ynh.fr, then when it’s done*, you can have a look here https://avignu.wiki.tuxfamily.org/doku.php?id=documentation:yunohost-stretch-v3.x.x.x-rpi_en
ppr
* This may take a while depending on the availability YunoHost’s team : they are volunteers.