You didn't say which county you resided in, nor where your child and mother reside.
Some counties are better than others. http://www.courts.wa.gov/forms/?fa=forms.static&staticID=14 http://www.courts.wa.gov/forms/
Those pages should have all of the forms that you should need. Some counties have additional forms and procedures.
Listen to that lawyer. He/she will have pearls of wisdom if you will listen. There is a certain way that things are done and that too varies by location and commissioner/judge.
Here's a good site out of the UK, which has some parenting plan
guidelines along the 50/50 shared parenting
concept. They are for informational use only. You can and should be flexible as needed. http://www.spig.clara.net/
Don't get your hopes up, but don't be totally negative either. The parenting plan is something that you really need to think about and put some reasonable thought into the development of your parenting plan.
Don't worry about your son being adopted out, she needs you to agree to that. So you will always have your son. Even if you can't be there now or when you would like to be there for him. Take a moment and really appreciate the beauty that you have in your child. Be thankful and respectful.
It's about time.
Enjoy some music.