Things are starting to come together, but I have the fear that I may be getting a lil ahead of my self.
  It started in November when my therapist who was sposed to guide me through this process, had a tragedy and closed her practice. Getting to a point of desperation, I checked policy and seen that  gender identity and expression was protected.   I told my human resources rep that I was trans, was terrified of losing my job but needed to move forward, her response was encouraging .  I told her that I would tell my manager of upcoming legal name change and change on drivers lic.in the new year ( thats important as I drive for a living ) .

  I feel Im jumping the gun as I am the first trans person to come out here so thereis no policy in place for trans individuals . 

  Because there is no policy, it may be a bit early to come out to manager with name change  for dmv purpose.  The name change is not that extreme  as it is a femme version of my dead name and I have been called that all my life . Only middle name and gender marker will change on identification. I may be impatient ... but I cant stand this much longer.  any ideas?

Just make sure you keep communication lines open and be clear about what you need, your rights and about how the company can best handle your transition - especially in regards to colleagues and clients. My experience is that if you are a valued employee and respected by your peers things should go smoothly - there's no accounting for some people's ignorance and/or bigotry/prejudices though, so just be mindful that there might be some land mines along the way.