Subject line says it all- sorry if this is repeat! Thanks!
Here is the current character who’s encyclopedia you can contribute to. New ones are posted every so often so if you don’t know a lot about this character don’t sweat it. A character you are familiar with probably will come up soon.
Unfortunately, you can only contribute to a certain character at a certain time. They have been recently doing Doom Patrol and Stargirl characters because of their shows.