Yes, figuring out things by yourself is a wonderfully satisfying way to learn a language.
People want everything to be in the tips and notes but really as far as possible I recommend trying to avoid them and learn by discovery. So much fun!
Is kirini "glad" and kirine "happy" or did you guys forgot to allow "the men are good" as a correct answer?
Why are some adjectives put before the subject and some after it?
I've read in another comment, that High Valyrian has not only singular and plural, but 2 others. Valar seems to be one of the others. "Vala" is singular, "vali" is plural.
Does anyone know the difference between "The men are happy." and "They are happy men."? I still have a problem with identifying subject and object.
Yes, however not all words are pluralized changing the -a to -e, and there are different types of pluralizations. For more information, check these pages: