Here are two additions to the topic which might also be helpful.
There's a short chapter (6) "Walking Mindfully" in Ajahn Sumedho's little book "Mindfulness the Path to the Deathless".
https://amaravati.org/dhamma-books/m...the-deathless/
...and here's Ajahn Amaro talking for approx. 5 minutes about walking meditation.
https://www.youtube.com/watch?v=8gTtTOT6U6E
:hands:
