You got a fine gun there. Most big gun stores can fix you up with a beginners book, or else hit the local library. Online, Google is your best friend.
The main thing with a shotgun is that it fits you, if your's doesn't, get it to someone who can make it fit.
Then get some light target loads, and some clay birds and have Dad hand toss them at first, (use the improved cylinder tube).
Good luck, and happy hunting!