Knights won't be part of the roleplay until the next race is discovered.
You can join now and discover the next race then make a new character of that race, but until then, the only fighting that will be done is with the animals in the forest.

A type of exception would be an inventive character that has made a weapon out of stone and very basic armor out of leather or bark. The wood elves currently dont have a way to smelt and smith metals.