trans | Coming out via Email? How to not be Tacky...

So I'm too much of a wuss to come out face to face or really even over the phone. I sound MUCH more intelligent when I can think about and write what I'm expressing. Has anyone else done this? Any advice? I'm not in fear of losing parental love, just expecting my mom to get in a spin trying to wrap her head around the idea. Putting it off is my first nature, I am delaying because I don't feel much like talking about it/messing up someone's day/and oh dang, it's HARD!

My dad is way more accepting an easygoing but I'd feel like a heel if I just asked him to tell mom. I don't need a form letter, but maybe just some personal experiences or recommendations. perhaps I should write a real letter rather than an email? My family is not the biggest on sharing feelings so I naturally like to keep a distance with this kind of mess XD