*cheers you writing LOTR* I'm looking forward to the results!

I'm afraid I'm not much help though, unfortunately, since despite being a lifelong Tolkien fan, I only tend to get thrown out of stories if absolutely no effort has been made with Elvish names. As long as they sound vaguely okay and aren't going by "Bob" or anything. In my main Tolkien phase I still stopped short of learning Sindarin, but it was a near thing, especially as I was into calligraphy for a while

(But LOTR was actually the first book I was motivated to read on my own in English as a teenager, outside of mandated class reading -- and I had read it in German several times already of course, except the appendixes which for some incomprehensible reason weren't included in the translation, but that was still true fannish dedication. It's not exactly easy going, if you aren't even fluent in English yet... LOTR actually was also the first book I did a book report on in fifth grade, and I think I lost all the audience and the teacher with my nerdily prepared handouts.)

If elves were more prone to mingling they probably all would go by Bob, because most humans and dwarves likely mangle the pronunciation of their "beautiful elf-language" so much to delicate elf-ears that they cringe, and the mortals probably confuse one elf with another too, because they all just look unearthly young and beautiful, like a worse case of that Hollywood syndrome where you just can't tell apart the actresses.