Hi Rose, thank you very much for your great advice. I was just afraid of putting months and months of time and brain power into something that might immediately be circular-filed because "we've had 63 googolzillion submissions on this topic this week alone."
....
So I figure I could be pretty naive as to what's out there in writing, too. Our library is pretty teeny.
Long story short (too late) I did get some responses to my original post, and I want to thank them so much for their input; it was very helpful. And thanks again, Rose. And Bufty. (I'm sure it was an excellent post before it went poof!)
Serena, I think we are all on some level afraid of pouring our souls and endless hours onto pages only to find out, later, that the plot isn't worth anything. However, just as it is very possible to spoil a great idea by crappy writing, a mediocre or "tired" idea can be made great. In my genre, vampires have been done to death, and yet they keep coming back from the grave
As for people going, "we've had 63 googolzillion submissions on this topic", it helped me tremendously to look in SYW under Query Letter and Critique. A lot of rejections come because of badly written queries; on the other hand, a well-written query will teach you a lot about the kid of book that looks like a winner.
As writers, it's part of our job to overcome insecurities and get our BIC. Even if the book isn't published, you won't end up feeling you've wasted your time if you're passionate about your work. And if you're not, why bother writing (IMHO). There are many different ways to earn money that are much less painful to the ego.
As for a small library, again, this is just my opinion, but it is very important to read widely, and it's very important to read in your genre as much as possible. You should check if your library has interlibrary loan
Best of luck,
Rose