Nostalrius Begins - Quality wow vanilla realm (1.12)

I do my username and password it doesent work. I tried my email but it was to long what do I do.

saying it "doesn't work" is not enough information for anyone to know the problem. Either way, the answer is in one of the stickies

https://forum.nostalrius.org/viewtopic.php?f=45&t=11569
https://forum.nostalrius.org/viewtopic.php?f=45&t=12567

Did you make sure to create a separate game account on the main Nostalrius website? You don't use your forum account to log into the game. Did you follow our advice in the other thread you posted?
https://forum.nostalrius.org/viewtopic.php?f=45&t=19896