The FUNDAMENTALS are crucial to reloading!
The front part of most manuals teaches these, and in my opinion are CRUCIAL to the learning curve. Hornady and Nosler are pretty good examples.
Have your person you plan to teach sit down and read the front part of the manual so he has a good understanding, knows nomenclature, understands the tools necessary, how to use those tools and execute the practice.
Once the person reads these and puts them into practice, my opinion is to slowly introduce them to upgraded techniques from an experienced hand loader.
There is SOOOOOO much information out there, it will become confusing to a beginner....
But, again.... The FUNDAMENTALS FIRST!
Just like learning any new subject!