Good luck, man, and don't pull a Grady Tripp on us...
And now for those who care on a Nordling-themed thread, I can perfectly understand the man. My own personal story is that I'm also an amateur screenwriter with a few of them under my belt and a job that, with the right connections, could get me into the market (which is why I applied for it after working at the exact opposite side of the line). Problem is I also write on impulse, or better yet states of mood, so sometimes I do it for many days straight (like in my past Internet deprived two week-vacation) and sometimes I just put it aside until I get back with my batteries recharged.
So yes, this is the reason I've been lurking this site for five years before finally signing in -cause I know writing IS addictive to me- and also of my post count being so low despite me being here for many hours a day (that also includes having it minimized at work, but I can assure I'm on CHUD daily). Problem is I'm hitting a rough patch lately, having finished nothing for the past year and a half, and everytime I go back to one of my scripts is either for rewrites or to go back to CHUD shortly thereafter.
The endline advice? Full dedication, a great force of will, and don't let it go over your head if sometimes you think it all adds up to nothing. Remember Louis Armstrong, you have all the time in the world (unless you're Chev Chelios, that is) and nobody breaks even as soon as they'd hoped.
...But if in the end we find out this was only to write "The Further Adventures of Dora the Explorer", you're gonna hear from us chewers.
PS: Now that Vader mentions it way above, one of my unfinished masterpieces DOES include many Chewer-named characters and references. It's called Negative Return(tm), is about a just married, maverick park ranger and a crashed down, traumatized (not amnesiac, mind you) astronaut on the run thru the Louisiana bayous from some evil NSA & Delta Force types, and I really hope to see it included in CHUD's Other Guilty Pleasures List come 2035. "Nordling", BTW, is the radio op for the mean Deltas.