I want to develop an mmo... where do i start?

I have a lot of experience I’m unity so now i want to try to make an mmo. Where do i start? Do I start with networking or gameplay mechanics or what? I have the whole concept down i just don’t know what to do first. Thanks. (Please tell me what i should do in order)

You can find an excellent resource for that here: http://www.squidoo.com/how-to-make-a-mmorpg

Also here is a link to a game design document: baldwin game design template there are many downloads available of it and discusions from that link.

Don’t give up on your dreams.

“I haven’t failed, I’ve found 10,000
ways that don’t work”
Thomas Edison