I agree with the previous attorney. UW Law School is free, but sort of hard for a beginner to orient themself. Seattle University Law School costs $5 (I believe), but is easier to manage. Start with the Nutshell series, Washington Practice, and Concise Hornbooks series. You may have to reference the broader topic of Employment Law to find your subset.
Not many website that would do you much good, unfortunately. You can always ask questions on Avvo, though :)
Go to your local law school library.
I see pro se litigants in there all the time.
The law librarians, law school students, and
even attorneys visiting can help you if you
ask politely. There's TONS of stuff to read
also. Good luck!
THIS ANSWER IS PURELY FOR ACADEMIC DISCUSSION ONLY AND DOES NOT CONSTITUTE ANY TYPE OF LEGAL ADVICE OR LEGAL REPRESENTATION.
Depending on the issue you're dealing with you might also find helpful information on the Department of Labor and Industry's website and the Human Rights Commission's website.
Providing this general response does not create an attorney client relationship.