Any chance of taking an evening machining class at your local community college? I got hands-on, practical training by taking one, and I still hate single-pointing threads, but that's just me.
Here are two trial threading videos to pursue. None will be a substitute for hands on learning. You just have to get on the machine and set it up to cut threads. No it's not simple, it's a machining process which requires those threads to fit other threads.
Study and practice. I've cut 10's of thousands of threads in most materials and lots of different placements. All it takes is practice and experience. Start simple, inexpensive steel, quality cutting tools. You'll learn a lot from your first crash!
There are lots of good books on single point thread cutting out there plus the number of You Tube video's are almost infinite. Be careful on some of the videos, some folks have some "wacky" idea's on the subject. I have cut hundreds of SP threads doing rifle barrels---on both ends ( over 40 years worth) . That's not counting the airplane and car parts I've had to conjure up. It's not hard but does take a little experience and knowledge to do a good job. It's not rocket science and you will gain the experience very quickly but don't start your learning curve on a $400 barrel blank. Read up on it and make a few "junk" projects you can afford to screw up. You'll get it.
Tech college class.
Mentor.
YouTube.
Follow safe turning practices.
Practice. Consider using short chunks of cold rolled steel or even aluminum.
Run correct spindle speed.
Keep your work chucked up short (not more than 3x diameter) unless supported by tail stock.
Correct tooling, correct height and angle.
Tight machine (no slop on compound or cross feed).