Me neither! In fact, I've never written much of anything... I've done lots of planning and thinking, but when it comes to actually putting words on paper (or rather, into the computer) I lose all of my enthusiasm (sigh). What I've done for the story I'm going to attempt is the following:
a) develop a plot, a fairly simple one, that I've kept in my head;
b) develop a bunch of characters... basically I came up with names, and typed out a few characteristics of each one as I worked out what role each character will play;
c) come up with an outline, which is the most complete part. With a notion as to what the plot was, I sat down and thought out a number of scenes to advance that plot. Each scene has a couple of sub-points detailing what I want to establish in that scene. It sounds complex I guess, but really the outline is fairly simple, like this: "character A talks to character B; this scene shows character A is unhappy with the project, and that the project is behind schedule".
It was while I was reviewing this little outline Saturday that I realized I didn't have enough there for a 50,000 word novel, so I added some scenes. I'm still not sure that I have enough there... and what's there may not be very exciting. Lots of characters talking, I'm afraid....
My problem is not writing; it's finishing. When I have a reason to finish I complete the story, otherwise it sits there for years until I come back to it. Really and truly it's not that hard to write a story as long as you're willing to work on it. And since we're all doing it, we'll encourage each other.
I do a lot of starting, but no finishing. Most stuff doesn't make it onto paper anyway, but when I HAVE started to put it into words, I usually end up getting really discouraged at how little it resembles what was in my head. Seems like it's always better (or seems better) before I try to capture it.
I should probably do something of an outline. I HAVE done some synopses for chapters (similar to your outline, I think - brief descriptions of what happens in that chapter), but I have the beginning and the end with no connection as of yet!
And the characters keep changing as I think more about 'em. Hopefully they STOP that by the time I start writing, or this is going to be really confusing!
I don't know if I have enough or not. I guess I'll just have to try and see...if I can even finish the story, it'll be more than I've ever done. So far I don't even have many conversations to write, though, which worries me! Mostly it's people's thoughts...