Hey Oreo!
Thank you so much for the congratulations!
As for your second question: most of my concepts and layouts are self drafted. “Heartstopper” is based on a new preview template idea I experimented with, after I got sick of being copied all the time. And then I just build the whole “card packs” + storytelling thing around said preview template. As for my other shops, they either don’t really have a theme or are based on random ideas I have at night. Nothing too exciting really… And the layouts are always selfmade, unless I state something else in the inspo credits.
Tho, on my discord server, a fellow eggling has their own archive for concept ideas (shops, contests, etc.). I can invite you, so could have a look at it (if you want to) and further talk it out with said eggling (who came up with the concepts). If you’re looking for inspo and already existing ideas?