The goal is to bring all the text to the top flow in the word document. It is often inside a table and or a shape to help with page layout but this interferes with the conversion tools because they cannot deduce the order of the text that is required for HTML flow order.
Here are some typical operations from the sample project file:
just delete decorative images
use the accessibility checker to move to the next picture and repair the Alt Text.
It is a good idea to save the file now as it is easier to revert to a saved copy if you accidentally do some incorrect delete.