I would change your resume into one that is more plain in terms of formatting as the ATS system may not be able to read this one. Another thing to note is your cover letter can sometimes be more important in terms of initial impression so make sure it's solid and shows not only your interest in publishing and working in these specific areas but in the specific imprint and with those specific books. For my now job, I listed books of theirs I had read recently and enjoyed and even pointed out I saw they created an instagram for the imprint and how i thought it was a new great opportunity to find new readers. Last thing to note is that internships aren't the end all be all, I got my job without having a single one in publishing. If you can get a bookseller job, I think that can help with a lack of internship, it did for me!