Sanglebrandt,
I help out with the FFA welding contest that we have each year on campus, and two years ago we had a guy run though there who was going back to the international Skills-USA competition sometime later (he had already competed at that level, did not win, but had done well enough that he was able to compete again). Our competition at the time was centered on a simple brazing joint. He did well on the skill, but I am not sure exactly how old he was (though he HAD to be high school age).
I made it to the state level in Skills-USA, at your age and fared well (3rd). Our competition was apparently set up different, however. We did everything, not just in one area (started with a blue print and steel, flame cut, then mig, tig, and stick it all to the final piece), but from what I have encountered, you should be able to lay down dimes no matter if it's brazing or welding. DO NOT think that the skill is all that there is, however. Being good means you aren't just a welder with robotic hand eye coordination, but you can think too...
HTH,
gls