Hi Megan,
I was in the same boat as you back in October 2014. It's when I came out to my Wife and myself really. I was 47. Since October I have started with a Gender Therapist and I can not stress this enough that they are a HUGE help in self discovery, well the discovery part is really up to you as only you can really know. The therapist will help you on the right path to Assist you, keyword: Assist.
You have Final decisions in all aspects of Transition.

Anyway, My Wife is ok with it, remember not to force anything onto her too fast. I made that mistake and we had arguments. We decided to take each day as it comes. If you or her feel like you are pushing matters (Transition) and it may happen because we sooo want to let the world know, don't! Just talk about it, ask how she feels and go from there.
On Xmas I came out to my family. That was nerve wreaking. Talk about Anxiety attacks, lol. Well to keep it short.....My Family supports me 100%...My Sister like 10000% HAHA. She loves it. My neighbor friend knows, and family friends know.
When my Family visited me on Feb 20th I presented Female, My Mom was estatic, My Step-father said "Oh ->-bleeped-<-" with a smile and my sister just wanted to show me off. Well, not much to show as
I still am Pre-Everything! grrr
And talking about Pre-everything...I finally have my first Endo visit on May 13th. I am 48 yrs old as of January and so much looking forward to it. The Doctor treating me called me and told me the Bloodwork and results will be the same day while I am there, and also within the 30 min between Nurse appointment and Doctor appointment.
I expected to be on Hormones back in Jan already but it looks like May/June now. Am I a little frustrated? I was because like many, I wanted the most important thing to start..Hormones. Then again as I look back, the most important thing is being content with yourself. The support from Family, the understanding of a journey I have just begun was and still is THE Most important aspect.
The road ahead is still long with many bumps, curves and Stop signs, but if I don't rush it, let it happen as the days come and go, I think it will be a much easier path.
So, as I see your situation, I see a mirror image of mine when I started. Yes, we are different people but if you take your time, put one foot in front of the other as you go down your chosen path, I see success.

You are not alone.

*hugs*
Jessika