I would say that a routine should be kept simple. It is important to utilize compound movements like the squat, deadlift, good morning, barbell shrug and bench into your routine. Study and learn the fundamental movements. Look at video. Gather as much info you can on proper form. Utilize proper form. These compound exercises are the key to your overall growth.
Diet is dependant on your goals. Think of yourself as a piece of clay. What you put into it and what you do on a daily basis will mold you into a structure. Learn the basics of nutrition, your body and genetics.