These primers will give you a workable knowledge of Diarenyë. The first primer simply builds vocabulary, and knowledge of grammar terms. The second teaches you intermediate grammar, as well as vocabulary. The third gives you more complicated grammar, superlatives, passive tense, etc.
The lessons continue sequentially, Primer I ends with Lesson 5, Primer II begins with Lesson 6
Go to the first primer.
Go to the second primer.