Most important bit is to create natural tense free time while teaching him . Maybe also think about demonstrating in front of him . Some might say no but who does he look up too and who does he try to copy . If you got that close bond and you both comfortable with it . I suggest that .

I have boys and when they were tiny I remember clueless as too how to potty train them too wee . I understand now the best way wasn't to stand up and pretend . But I'm sure it created closer bond because they must have been thinking what the heck is mammy trying too do ?
Anyway good luck trying to find a method that suites and works for both of you x

Working on that now. Plan is to break into steps- first grab the toilet paper for him and hand it to him to do the wiping. Once he has mastered that step, then I will teach him the first step of getting the toilet paper off the roll.