First, welcome to VAF!
There are several young builders out there. However, I would say it really depends on what is in store for your immediate future. Are you going to college? Going to be close to your kit? Have other builders based around you?
I was lucky enough to stumble upon a -3 empanage that was being given up on VAF. I was 18 at the time and chomping at the bit to drive rivets and build, so I jumped on it. It turned into great support from other VAF members, and I soon had a -3 tail kit in hand. I had dreams of finishing that tail immediately, but still had to gather tools, space, knoweldge, etc. Something everybody needs when starting a project.
But, I wasn't able to get tools I needed right away. My dad and I put together a room in a barn on our farm, and I moved the project into there. Finally many months later I was able and willing to cough up the dough for a tool kit, and I started playing. I had a pretty good set up to get building at home, but by then I was in college, 3 hours away from my project. It was hard to work on the tail when I was away from it for 1-2 months at a time. I spent time with the kit on an occasional weekend home, but spent more time studying the plans, looking things over, playing with some tools, maybe get a piece cut (you have to do much more with the -3). But it was difficult to get back to it later and see where you left off, and very time consuming to figure out after being away for so long. It was an example of life getting in the way, I wasn't going to have the money for the next kit till I had a job after college anyways, so I wasn't in any rush. But, I was learning, and that was my biggest goal.
I'm now 22, just graduated college, getting a job, and moving into the 'real world'. I'll be soon moving to a new place, and you can bet that my -3 tail and tools will be with me
! I will now be able to take my project with me and have it right there to work on. Plus, with an actual income now, I'll be able to save and purchase a fuse or set of wings when it comes time (hopefully before my girlfriend takes all my money *cough*) .
I don't discourage you at all from starting on a tail. It is a great learning experience. But in hindsight, you can get experience by finding a local builder and becoming a 'shop assistant' in your free time. I would recommend doing that instead to start out. Then when you have the means, location, and time, you can take on your own project. You will hit more roadblocks like I did if you don't have those things. But in time you will. Be patient, it will pay off, don't lose sight of your dream.