I understand Deja-Dup can backup my /home folder, but that folder could contain hundreds of GBs of photos, videos, documents etc that I already backup in different ways.
What is the recommended way to easily restore my system if I messed up the system too much?
I believe there can be 2 approaches:
create an image of the drive (periodically) and exclude folders like Home/Documents, Home/Pictures, Home/Video, Home/Music (which means all other /Home/… folders and files, required for applications and also the appimages and dockers will be backupped).
only backup everything that customised the default UB install: /Home (excluding personal media folders) but perhaps also /usr and some other folders?
What would be the recommended approach and is there a default tool?
Ideally, during system boot, you would want the ability to hit an F button and get the option to restore.
Or simply do a clean install with a USB drive and install some application that will restore everything you backupped with approach 2 (although I am scared I might miss something and will need to spend time reconfiguring/personalising the system).