I’ve been making glitch art for about 10 years, I’ve been a bit lapse in my tutorial creation the last few but I have many tutorials/notes here:
letsglitchit.tumblr.com/tagged/glitch%20art%20tutorial

I also administrate a group on Facebook called “Glitch Artists Collective: Tool Time” dedicated to teaching ppl how! Facebook sucks but ya can just lurk haha