The British Library online scan is fantastic and well worth a close look. They also have pre-restoration images of the scroll. Seeing it in person is a little disappointing since they only unroll a bit of it at any time.
It's difficult to overstate the importance of this and similar primer texts from this period. Every literate person not only in China but elsewhere in the Sinic reading world would have memorized this as a child. You might not speak the same language, but you could both read and write this set of 1000 characters.
Josh is a great guy who's made tons of contributions to the community, not least of which is his REXPaint ASCII editor: https://www.gridsagegames.com/rexpaint/
Not sure if a site compiled by the Canadian Plastics Industry Association is a great source here. Even though it cites sources, there's probbaly some strong selection bias going on here.