Congratulations on the new Dutch Oven. They are a lot of fun to cook in! Feel free to stop by camp-cook.com and join the cult....errr....club.
Here's two tutorials that should get you started with a minimum of fuss. They are pretty short so it won't take you long to read through them.
Basic Equipment
Basic Technique
If you are just starting out and wanting to cook on the back porch, a metal oil pan works great.
Of course a 14" might be a little big for an oil pan, but a metal trash can lid would work too!
Enjoy your new oven!!
Joanne