Um, I just wanted to make sure the dude read that. It's pretty much key.
Here's a brief interview that discusses some of the misconceptions about creatine. If your parents are scared, make sure they read it too:
With that said, however, if your training and food aren't properly in place, there's very little sense in taking creatine, or any supplement, right now. Especially if you're trying to gain size, you better be focused on eating as many egg and cheese sandwiches, roast beef sandwiches, and tuna sandwiches as possible. Don't try to avoid carbs or fats. Eat plenty, sleep well, and be consistent with your training.
Ideally, I'd like to see you take a brief break for some bodyweight training, to make sure you're fully prepped for an intense lifting program, but you should do fine with any free weight-based plan that includes plenty of barbell and dumbbell work.
You're only about 10 pounds heavier than my girlfriend's son, who's about your age, and I can't possibly imagine him taking a tough football hit. Kiddo looks like a stegosaurus when he leans forward, with all his vertebrae poking out of his back.
For you, right now, fish oil has nothing to do with building muscle. Or to put it as an SAT analogy, fish oil is to building muscle as good math grades are to picking up girls. It might help, but it's wayyyyyyyyyy down on the priority list.