This is not The Lord of the Rings. It isn't even in the same genre, and the difference is greater than with The Hobbit (and in the other direction).
Though I will note that reading it will transforming a re-reading of The Lord of the Rings.
A saga of the beginning of the world, and the heroes and tragedies of the First Age of the World. Many of them. In places the style is distinctly summary. (Oddly enough, reading the partial versions, as in Beren and Luthien underscores it when I compare the more full developed and dramatic versions, even if the story itself was not brought to its end.)
Much of interest, if you love Middle Earth.
Though I'm not kidding about tragedy. It defeated me in my first attempt to read it in my teens because I could not take Turin's story.