Nice. I also do a bit of writing (currently working on another book which I'll hopefully finish this time, lol) and I've talked to a few writers. Had a pro as a teacher too.
The biggest deal is getting it published. Many publishers only do so many books a year so they pick the absolute best ones. The minimum wait time from when you send it in to when they get back to you can be as long as 4 months. And that's assuming they like it. Not to rain on your parade or anything.
Good luck with the book and let us know how it goes!