Join Date: Aug 2009
Location: New South Wales, Australia
There are a few problems, honestly pretty much no one will employee a 16 year old to train their horse. Socially and legally you're still considered very much a child.
There are a few things I'd recommend. First, can you get an apprenticeship or working student position with a reputable trainer? That will give you hands on experience, and a reference, and get you into the industry. If that isn't an option I'd look at working towards your instructing certification. I know here Pony Club is always wanting volunteer instructors and have their own certification program, that might be a good starting point.
Also - be successful, start training successful horses. Compete yourself, get your name out there so people know you. If you're still at school work really hard. You're right about the trouble of not having your own yard, your own float, car etc. All these things cost money, and usually more than just training can provide, at least in the beginning. You'll probably need another income if you want to look at opening your own training business sometime.
The things I look for a trainer are reputation, history of success and experience/qualifications. You need to build those up.