Hi a good start might actually be with an MS Access Database. If you are looking for a good graphical interpretation I think what you might want would be what they call relationships.
I would start with Access, and then move in to SQL server. While they differ in a lot of ways it could be a good stepping stone for you.
You can also import/export from SQL to Access, but I wouldn't make that a habit due to the differences between the systems.
Otherwise there is a few tutorials over at the MySql Workbench website, the one by Djoni Darmawikarta was pretty good for beginners.