Reddit reviews Twenty-four Italian Songs and Arias of the Seventeenth and Eighteenth Centuries: For Medium Low Voice (book with online audio) (Schirmer's Library of Musical Classics)

Hey :) Choral is a great direction to go, so just props for moving in that direction.

One of the best resources you'll want to look into is the 24 Italian Art Songs and Arias book. I've linked the medium low which I imagine will be the best place to start for a baritone. I think picking just about any piece from that book would be a really good start for an undergraduate audition.

In English, especially for male voices, I think Aaron Copland's Americana works are another really great find. The tunes will probably be at least passingly familiar, and they work really well with baritone voices. Here's a link to one collection - I've never used that one, but it's worth looking into. Besides that, Gerald Finzi is another composer that does English language pieces that sound great for male voices.

As far as German, Schubert, Schumann, and Brahms are kind of the biggies in German lieder. I honestly don't have that much experience with German music (it's a bit of a failing of mine, personally), but I sang Schubert's Lachen und Weinen in high school, and I'd say it would be a good level for an audition. Actually, come to think of it, I think I auditioned for my undergrad on that piece. So yeah.

French-wise is a little harder. Fauré's Lydia (the second in this set) is a pretty popular choice that is not too hard. I would stay away from later Fauré, though, unless you're very comfortable with French artsong, because it can be deceptively tricky. Debussy's Mandoline is another popular French choice. It has some challenges, but it's relatively tame as far as that genre goes. I am sure there is other Debussy, Fauré, or Ravel out there that would work if you are willing to dig around a bit.

Afraid I don't know much Spanish repertoire, so hopefully someone else will help you out there.

Good luck with your audition! :)

For musical theatre, I would recommend referencing The Singer's Musical Theatre Anthology. There are 4 books for each voice type.

For classical you can reference the G Shirmer Opera Anthology. There is one for each voice type. The 24 Italian Art Songs and Arias is another great resource, especially if you are wanting classical rep for students.

Those resources have a ton of options. Not sure if you were wanting just a few examples.

Since you are just beginning taking vocal lessons, one of the best places to start is the Twenty-Four Italian Songs & Arias book. There is a "medium low" book, but even as a soprano the music in the medium high book isn't very, well, high. I live under the "schooling" of don't sing big rep/arias until you can work good technique into them, though that's always up for a debate. The 24 Italian songs may come off as "simple," but some of them are actually really beautiful and good for first time singers. Good luck and have fun! :)