If you like the look of drystone, here's a *free* and very beautiful (if I do say so myself) drystone walling guide I made that you can download at the link.
https://kristie-de-garis.ghost.io/i-walked-so-you-could-run-free-drystone-walling-guide-download-now/
Drystone is pretty magic. Unbeatable sustainability credentials, an ancient craft with a global tradition, kind to flora and fauna....I could go on.
Feel free to ask me any questions and I will try to answer.