DiveDeeper, Where are you from?
I suggest finding a diving buddy. Preferably with some experience, but otherwise, someone who is as eager to learn as you are and read read read before you try. It can be very dangerous if your not doing things right. There are so many different things to take into account. Including but not limited to. Blood PH, your diet, experience, knowing whats going on in your body when you do different things, dangers of hyperventilation, blackout, samba, going too far...past the point of no return and realizing its too late........just to name a few... Im not trying to scare you, but I do suggest you get very educated and always remember to be safe and never go wet without someone there to save your life if need be.
Best of luck and I hope your reading up as much as you are posting

Your buddy,
-Brian