I assuming Windows and Notepad 2012, yes?

https://usermanuals.finalemusic.com/NotePad2012Win/NotePad_Left.htm?Grace%20noe#CSHID=1|SkinName=main

Yes to both questions - Windows and Notepad 2012

I've seen that table on Maestro Fonts many times but it doesn't tell me HOW to get them. For an upstem eighth grace note, the table simply shows a semicolon (;)

When and how do I use a semicolon? Do I enter the note and then while selected, press the semi-colon? That didn't work. I can't press the semicolon and enter the note at the same time. 

I literally need to know the series of keystrokes to enter to make the grace note happen. I am at the point of printing the music and handwriting in all the grace notes but that would look terrible. :(

In and of itself, NotePad does not include grace notes; that is, you can't enter it as a musical entry. You can, however, enter the character as text, and move it into place on the staff. It won't play back, of course.

With the text tool, double-click on the score to open a new text frame. Enter a semicolon. Select it, and in the Text menu, go to Font> and scroll to Maestro Wide. The size will most likely be too small, so change it to suit. I used 18 in the attached example.

Upstem eighth= semicolon

Upstem eighth with slash= Alt+semicolon (I think. That's on a Mac, but Windows may be the same.)

Thank you. Now I just have to make it not so squishy... That's another lesson I'll have to search. For now I'll just be adding in the grace notes! lol