LOTRO is described (by Wikipedia) as a...
...massively multiplayer online role-playing game set in a fantasy
universe based upon J. R. R. Tolkien's Middle-earth writings. It takes
place during the time period of The Lord of the Rings.
Assuming your question is about the universe explored within the game then absolutely yes, these questions would be totally on topic here. It's fantasy and it's fiction which means it's right for SF&F:SE
If your questions are about the game's mechanics, the stats of various characters, walkthroughs, etc then the answer would be a decided no. Those questions would be better answered on another stack, perhaps Gaming:SE