Definitely. New fans often need a bit more background and context, and the light novel can provide that. It can be like a guided tour through Skyrim, showing the different locations, the relationships between the races, and the overarching lore in a more digestible way compared to just jumping into the game.
No. Fan fiction involving nudity goes against the general ethics and community standards of most gaming communities, including the Skyrim community. Such content is not family - friendly and can make many players uncomfortable.
One of the great Danmachi fanfics is 'A Different Perspective'. It offers a fresh take on the characters and their relationships within the Danmachi universe. The story delves deeper into the backstories of some minor characters and makes them more significant. Another good one is 'The Unseen Adventures'. It takes the characters on new quests that are not in the original story, adding more excitement and mystery.
The Danmachi light novel is finished. The author completed the series, providing a satisfying conclusion to the adventures and developments of the characters.