"Goon #4," by Tod Goldberg, in The Darkling Halls of Ivy, edited by Lawrence Block, LB Productions, 2020.
It makes sense that this story appears in an anthology edited by Lawrence Block because the main character reminds me of Block's meditative hitman, Keller.
Goon #4 (his mama named him Blake) is an ex-military thug, now specializing in high-risk assignments, bodyguarding bad guys or making bad guys wish, in one final moment, that they had hired bodyguards.
Blake has made enough money to retire. But what to do now? He decides to go to college and winds up, more or less by accident, in a class on radio performing. Here he is pondering the building in which the class is taught:
Whole place was maybe 2,500 square feet and could be attacked from about twenty-nine different angles. A totally unsafe spot to conduct an op... but Blake guessed it was probably fine for learning.
So Blake may be has a little trouble separating his past life from his current one. And when a professor gives him an assignment, rest assured that he takes all assignments seriously. Perhaps too seriously...
A fun and quirky story.