In Mac Notes you can only export one note at a time as a PDF file. With the help of a script, you can quickly and easily export all of your notes to html files as a backup or archive. You can also save notes this way to clear out your Notes app.
You can use a shell script inside an Automator Quick Action to add the date of a file to the beginning of the file's name. You can also make this work with photos using the date the photo was taken from the metadata in the file. As a Quick Action you can easily apply this name change to one or many files at once.
If you have a cluttered Desktop, you may want to occasionally hide the icons. You can do this with third-party apps or Terminal commands. You can also write a very simple shell script in Automator and save it as an app. Then you can toggle the Desktop on or off with a simple click in the Dock.