I try to enter a username when i start a new account but when i klik ok it says enter a nickname with no spaces or ilegal characters. what does that mean. please give me a username i can use or a couple

It means you can't have "Illegal charactors" in your name.
( Example(s): *asshoie*,assh`~ole, >asshoie<... and etc. )

And it means you cant have "spaces" in your name.
( Example(s): ass hoie, a s s h o i e, a ss ho ie... and etc. )

Understand, now?