That's fair, although, if it could be said that Tolkien's book Lord of the Rings is a bit inspired by the heroism of Christ, the best analogy for the story of Numenor is it's the fall of man, Noah's Ark, and Atlantis combined, and it will inevitably be dark.
The title is a bit misleading, as Amazon's series is based on different material. It's presumably called 'The Lord of the Rings' because its title character is the same as that of the book and original movies.
Hey, definitely check out Blockpad (https://blockpad.net). It does calculations with units, integrated with documents, spreadsheets, and drawing. Speaking from the Blockpad team here, would love to hear your experience.
We have Windows app and beta web app. Also Mac app coming soon. It's free for students and otherwise still inexpensive.