@LegoClub, being a part of LUNI is not a title that you recieve when someone is in the right mood, being a part of a team means you are engaged in helping the project. Writing precise tutorials and translating documents to another language could be a form of contributing. You could also frequently look around here, IRC or on Github to see if they are any ingame research tasks to be done (none atm) for which you don’t need to be a developer.

if you have old LU game files lying around, it could help to upload them somewhere, and you can use your memory or rewatch videos of LU to write how the game behaves, what it should be doing when interacting with it somehow. For that the most important part is that this is precise research and not statements like «Nexus Jay gives the player a mission». But don’t ignore resources that are already there. You can use the LegoUniverse Wikia Wiki to find some additional information.