I'll start us off, then.
To everybody starting off, don't be disheartened by the length or complexity of lesson one - the following lessons are much shorter and far less complex.
It was a bit of a challenge comprehending aspiration and voicing and all the rest of it. Once you get past it (and not all of it is essential) the rest will seem easy as pie. I had trouble not aspirating my "t"s to begin with.
Something both Kath and I had trouble with is pronouncing "h"s. Fortunately, we classed all the different pronunciations and there were only about 5.
Another trick which I use is to copy and paste all the summaries of the lessons. When I'm not sure of something, I can quickly reference it by finding the piece of paper instead of having to start up the computer.
Finally, a useful source for Quenya vocabulary is, again,
Ardalambion. I don't really trust other sites, and would advise people to stick to Ardalambion.