Added 3 minutes later
At least there are textbooks for real, popular languages, but for Quenya, there is only one more or less decent guide, and even that isn't very good. It's difficult to learn from a dictionary. Of those fifty words that I struggled with every day, I actually learned only two or three, and the rest crumbled the next day like a sandcastle.
Added 1 minute later
However, I shouldn't have taken fifty words. I should have taken twenty. I just calculated that I would learn all the words in a certain number of months. And I failed).