In reply to cheds1989:
I would caution against doing instructor training (at least with the goal of instructing people) after only doing 40 leads, I picked up a lot doing my SPA training after leading something in the region of 500 pitches worth of trad both in the mountains, little inland crags and on sea cliffs and am not convinced you would fully absorb all of the information without a strong wealth of experience already.
Outside climbing walls all of the instructors I have previously had encounters with have been keen outdoor climbers with a vast wealth of experience and knowledge about climbing, its ethics, how it developed, problem solving and the outdoors in general, this knowledge beyond the safety aspects has always contributed significantly to the experience and without being immersed in climbing for a while you simply won't gain this knowledge.
Best of luck if you do decide to take the instructor route but I felt it was worth offering a note of caution.