a beginners guide by Raymond Buckland or Scott Cunningham would be best. avoid Silver Ravenwolf for your year and a day [To Ride a Silver Broomstick and Solitary Witch are the only two i've heard anything positive about, but i haven't read either] the reason i say this is because a lot of people claim a lot of her writing is inaccurate, and i've watched some documentaries where they interviewed past followers of hers who are now against magick because of what they were taught. not saying this will happen to you, just a heads up.
casting a circle and protection might be the essential spells to know. don't focus on the spells, it's just one piece of the puzzle so to speak. start with meditation and energy work before spells, you need those to cast successfully. once you know how, try simple candle spells, to get the hang of casting.