...does anybody remember Lisa?...

Yes, but it was before I finally "bit the bullet" and actually bought my first PC.

As to what was the first graphical interface - you need to qualify with "first popular," first "publicly available," first "commercially successful," etc... etc...

You'll get all kinds of arguments about this.

The thing that intrigued me about Lisa was that some pundits suggested that it could write music, although I never got far enough into it to know whether that was actually true.

For a real history of this old stuff, try to find Edition 2 or earlier of The Hacker's Dictionary. The latest editions leave out most of the fascinating history, but if you can find one of the older one's it's a good read.

John