Whilst the RPS distinctions may well have some standing within the camera club world they do not generally in the commercial and art worlds. As such, the aesthetics required to achieve one of these distinctions is somewhat driven by that prevailing in the camera clubs. I applied directly for the ARPS when I was 18 as it had some credence to helping me get some part-time work as a camera club judge (by the way, in my day there was no need for a 'Statement of intent' otherwise known as verbiage applied to a VISUAL medium). I cancelled my membership of the RPS a couple of years later when the requirement that the photographer had to have made the prints themselves was removed.
None of the RPS destinations will help you get a job (outside, possibly, of the medical and archaeological specialisms). As to teaching you need, as Mike pointed out, at least one Phd with more being better. Perhaps this is the reason that I (no Phd only the old Institute of Industrial Photographers Professional Qualifying Examination qualification) regularly get requests for private tuition in analogue B&W photography from students studying photography at university.
If you want to set yourself a goal, far better would be to work towards a book that really works as a book rather than simply a collection of photographs that you like.
Bests,
David.
www.dsallen.de