If you want to do it yourself, it is still a complicated matter. Do you mean anthology, printing or publication? then
meitu xiu xiu
Or photoshop, if you print it.
Cover picture
It doesn't matter. If published, please pay attention to copyright issues, find a good cover map, and determine the desired cover size. If it's simple, just type the title, author's name, introduction and typesetting yourself, and that's almost it.