For protein go for a whey protein(not soy protein, not soy becuase it could be bad for males, due to the hormones in it) I would recommend Designer Protein, or Prolab protein. Something that is over the 20g per serving mark, don\'t go paying for that stuff thats at 30g if it\'s too much. As for that stuff that u squirt under your tongue, that is creatine. It\'s pretty good stuff, because you don\'t have to go through a loading phase with it.
As for chest exercises, I would say the best combo, would be a decline/flat/incline bench would work out the upper, lower, and major part of the pecs. You could also through in some barbell presses, and some flys. But the major amount of muscle in the chest area is going to come from bench. And when benching don\'t be affraid of pushing yourself, do a warm up and put on 5-10lbs more weight than you think you can bench.(make sure you have a spotter, or an escape route planned.)
And as for getting amped up for weight lifting, get a partner, and a goal. The partner will help you once you\'re in the gym, and they\'ll help you push yourself further than you normally could. And if you have a long term and short term goal set in front of you, it can do loads of help for you.