Okay, so it's only the second day, but I'm currently happy with my progress, so I thought I'd post an update.
Brant sent me back the first 250 words, complete with changes and suggestions. I kept some and discarded others, but the process of deciding which changes to keep got my creative juices flowing, and so now I have another 250 words, and I'm happier with this beginning today. (It may not last for long, but I'm going to enjoy the sensation while it lasts.) I'm even happier because I managed to write a relatively decent few paragraphs after being completely exhausted at the gym.
It's still too early to say for sure, but I think this really might help. Thanks, Brant. You and Kathryn have been fabulous since day one, but this is going above and beyond the call of duty, and I really appreciate it.
Incidentally, I ran a mile in 10min 20s at the gym today - my best time ever! (Yeah, I'm a wimp-in-rehab.) Another thing to be happy about!