I like that I can interface with it in ways that I already understand (eg rclone, sync, sshfs).

Being able to run some commands on the server meant that I could use rclone to copy my AWS and OneDrive backups directly cloud-to-cloud.

This scheme does not need a list, and if necessary could be simplified enough, some common part with first three letters of the site:

• For Instagram: my-memorable-password-Ins
• For Facebook: my-memorable-password-Fac

The memorable part could be the initials of a favorite song lyric, or something: nggyunglydIns, nggyunglydFac etc.

But the suggestion of using the Chrome password manager sounds like it will be seamless. I don’t know if it would work on IOS, but on Android it fills passwords in for many apps, not just web pages.