Mayland -
The first 10 years are the hardest, both in training and in teaching. So hang in there with both and strive to become even better.
I recommend for all teachers to look at others who teach (in all fields, not just Aikido or M/A). Which of these do you feel were really excellent teachers and what did they do that you think you would be able to do. Good teaching methods do not change with subject taught. Try different ones on for size and use those that "fit".
Accrediting instructors. This is neither a good idea nor a bad idea. Some type of organizational accreditation is an useful guideline for people who are "shopping" for a dojo. In such a case, it informs people that the particular instructor and dojo has a national or international body behind them. However, this type of accreditation says nothing about ability to instruct beyond some agreed upon minimum.
It is also a bad idea, because in some cases "guidelines" and "standards" become "rules" and "laws" which can be wielded by orgnaizational hacks and politicians who may have stopped doing anything except to "run" the organization. In some cases this leads to political infighting and rectal kissing with the formation of "in" and "out" groups. Promotions then become more of a political choice than a merit choice. Hence it is a bad idea.
What I look for in senior students is their technical ability of course, but for those who want to help teach I also look at how they communicate with beginners and other advanced students. "Experts" and "Know-it-alls" who spend much of their teaching time talking instead of training are apprised that this is not the standard here. Showing how well you do the technique is not the same as helping someone else discover how well they can do the technique. This is why I hold instructor's classes.
I have much more I can say, but this gives the general train of thought. Good luck, hang in there.