Hi. I am trying to learn how to change the excerpt length to 40-55 word excerpts per grid item, how to let the title of the post in a transparent overlay thumbnail on top of the featured images on the grid, so that all you can see is on the background is the article text, and how to change "Read More" to "Continue Reading". I'd be glad to write a public thank you with a link to your products in exchange for the right information or changes. Do you know how to do this? Thank you.
Welcome to our forum.
Under the layout editor you can customize excerpt word count, Please see the screenshot
https://imgur.com/a/WRZyQoI
There is a filter hook for post item thumbnail, you can add your own html with it, please see here https://pickplugins.com/documentation/post-grid/filter-hooks/filters-post_grid_filter_html_media/
Regards