Welcome to the forum. That's can be easily done so that it will update on all sheets, but not with the workflow you outlined. See below.
1. Set up Custom Properties in your Drawing Properties (File > Properties) and enter the information there.
2. Edit your sheet format, and link the notes in the title block to the custom properties.
3. Save the sheet format.
4. Save the drawing template.
See What's the difference between a sheet format and drawing template? for more information on some of these steps, and reply back here with more question on specifics, such as linking notes.