Could it be an idea? Then make a post, perhaps put at the top, fixed in evidence, or an entry in the forum even if it will contain the links or a single post with the links,
post or something, with external links for references, (or other name)
with the sites you mentioned here
Paint My Photo Paint My Photo, morguefile.com, FB group links, pmp-art.com,
thanks for the reports. I didn't know them
links, and maybe a note, information, such as external libraries with copyright-free images, resources that can be used for free to create art, draw, paint, etc.
Sometimes I google this or read names
Pixabay should be the name of one.