I am working on a commentary on the Psalms. I have decided to compile some helpful links that I discovered during my research. It includes a mix of exegetical and sermonic links. Here is what I have for Psalm 121 (in no particular order). Feel free to mention any that you find helpful in the comments section.
Analysis by C. J. Labuschagne: https://www.labuschagne.nl/ps121.pdf
“A Dsturbing Question with a Reliable Answer” Charlie Dyer: https://voice.dts.edu/chapel/a-disturbing-question-with-a-reliable-answer-dyer-charles
William Barrick’s notes: https://drbarrick.org/files/studynotes/Psalms/Ps_121.pdf
Ian Paul: https://www.psephizo.com/biblical-studies/looking-to-god-for-help-in-psalm-121
Danny Akin (outline, manuscript, audio): https://www.danielakin.com/the-god-who-is-my-help-through-the-psalms-series
Psalm 121 devotional: https://www.generations.org/devotionals/206