Hi Vicky! Welcome. I'm not staff either, just an omnipresent nuisance! Since everything here is PD, [
In the public Domain] I can't see that there would be a problem doing what you are doing. There are others who have made compilations of work displayed here and made a living out of them. One
Craig Yoe is a prime example. And good luck to him.
Can you tell us what kinds of illustrations you particularly look for? That might help us make recommendations.
If you credit CB+ that would be more than many people do, so thank you!
Nice to see someone take up bookbinding! If its known that you do that,you should get work, because there are plenty of us that have work that needs rebinding.
Sounds like you are surviving lockdown very creatively!
If you don't want to stick with covers, you might take a look at the
Woman Comic Book Artists thread.
https://comicbookplus.com/forum/index.php?topic=17587.0 Electricmaestro has been compiling an encyclopedic reference there.
The images posted are not 100% but the sources are listed, so using the search Function at the top of the page you can go right to the originals.
I'd very much like to see your work!
I second the vote of confidence!