I went as far as buying all the kit and our association took some excellent lessons from Shirley and Richard Bond but we never went as far as the exams for several differing reasons amongst the group of us. It is a fantastic subject and very rewarding for the keen budding microscopist.
My best advice is to learn how to prepare pollen slides and start gathering pollen from plants you can identify which you can build a pollen library of your own from. Then you can find out what your bees have been up to. Pollen identification resources in books and on the internet are not great. Anatomy you can do anytime. Once a particular plant has flowered that's it until next year. You couldn't find crocus, snowdrop, hazel or willow where I live now and in another week or two at most the blackthorn will be gone for another year.
Nigel was a boffin and I am sure can give you some great info.