I think that's why I love doing NaNoWriMo each year. A blank canvas and a month to create a new world filled with new friends who go off on new adventures. It's also probably why i never manage to join in the follow-up month they do in March for editting.
Anyway, it certainly is an achievement to write a book but the hard part isn't that. The hard part is getting it published and even if you go the indie publishing route like I have it's still quite hard.
Let's face it, there's a lot to learn. Book cover design. Formatting. Uploading to various sites (yes it will be yup elsewhere this week.) Working out how those sites market and rank books. Marketing and promotion of the book.
In this area I do have a slight advantage in that I have a background in the area but given so much of the marketing is actually done on the internet there's so much to learn.
So far what I've learnt is that there are lots of wonderful people out there in the twitterverse and online who are happy to review your book, interview you, retweet your information and so much more. It's amazing how generous and helpful people are, especially other authors.
I guess my point is just because something is difficult and daunting doesn't mean it's impossible and that you shouldn't do it. It just might mean you have to work a bit harder than you expected to get what you want.