Petree... It's not just if you love it, what happens if you fail the medical? What happens if for family reasons you can't afford to do it? What happens if the aviation industry collapses?
You need to have a backup plan. Your only 15, another year or two of studying in High School will help you build knowledge in different areas such as Maths, Physics, English etc. I believe your trying to jump into the industry far too quickly without realising what happen if things go wrong.
If you have an interest in Geography and reporting you need to have A-Levels and most likely a degree. You wont get into University without A-Levels and you can't get a good job without a-levels either.
If I were you, I would study my A-Levels, get a part time job, starting funding your PPL(H) and see how you get on. Once you have finished then you can start looking at what options are available for you.