Awesome and scarey mixed in together is the most baffling of emotions mixes. I prefer to do things step by step and this compounding of situations you are about to step into would throw me too. You do these things for your true self, your soul. So go for it
Might be a good idea to start wearing the suit whenever you can if you don't already. I mean while on your own but if there are people who you feel comfortable around, even better. If you can be at the point where you are already comfortable in your clothes prior, you wont be needing to spread the coping skills so wide.
I'm not too sure what to suggest about the coming out to everyone situation. I lived in a small country town when I started letting people know and it soon spread throughout the whole town and neihbouring towns on its own. It wasn't as bad as I imagined in my head it would be. I was still surrounded by people who loved me. It just became more noticable who didn't. And they don't matter as much as YOU matter.
In the wise words of Devlyn, I also say push that button

One day you will be looking back on this moment in time, very glad it took place.
All the best to you buddy!