I see you are in BDSM Mentors group. i found a local guy who mentored me when I was learning, it was a great help. There is also a book named “Flogging!”, by Joseph Bean you may be interested in. Explains some of the “science” behind it and more.
Also, I started a joke group named Floggers Anonymous which ended up having over 150 members. Flogger addicts and makers alike. Come check it out if you like. If this post isn’t appropriate, please feel free to delete it admin.