I suggest looking into Learning Sciences programs, which are buried under Educational Psychology, Education, Instructional Technology, and other related programs. Learning Sciences is all about the theories of teaching and learning, and of course, people specialize in higher education (as I've found, undergrads are easy participants to get on a university campus!). I study how to enhance teaching and learning with ed technology in higher education, but in STEM. However, I do know that social science/humanities work in higher ed does exist! It's just hard to find because there's so much more grant money in STEM, plus these fields tend to use more tech and other "innovative" interventions.
You can take a look at some of the syllabi here to see if this type of work is of interest to you: http://isls-naples.psy.lmu.de/syllabi/index.html
This list also gives you some names of folks in the field, plus you can click NAPLES members to see schools with these programs. They are all very different, which I've found through applying and speaking with other grad students.
I also second looking into the work of specific professors and using that to figure out what program to look into, but there are also general programs that can probably get you close enough to start. Northwestern, for instance, has a rotation system so you can explore in the first year.
Happy to talk more about what I've experienced, so feel free to message me!