I would certainly be able to give you a few pointers. By the time I was your age, I had been working for several years and was well on my way to saving up for a post-high school trip around the world. I'd basically decided when I was about 14 that that was what I wanted and I worked hard to make the dream a reality. Indeed I managed to save up enough and a month after graduating I took off for a 4 month trip across Asia, Europe and North & South America. The trip was incredible - in four months I made a heap of new friends and got to experience some amazing new countries and cultures. I learnt a lot too, including picking up bits and pieces of quite a few languages. Most importantly every single day was fun and an adventure. (Well, maybe except for getting food poisoning a couple of times, but I try not to dwell on that.
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I enjoyed the first trip so much that I decided to do it again, the next time going for twice as long and living/working in Germany for more than half a year along the way. Australia has partnerships with quite a few countries that allow young people (aged 18-30) to "work and travel". Germany is one of those countries; I believe others include the UK, Japan, New Zealand, Chile and the Netherlands - I'm sure there are others too.
I have absolutely no regrets and I would encourage you do some travelling too. I guess the main piece of advice I would give you is that your dreams can become reality if you set your mind to it and are prepared to work hard.
In terms of frequent flyer points, I started out collecting Qantas points about 5 years ago. Originally I didn't know what I was going to do with them exactly. After the first RTW trip (where I flew pretty much exclusively on Qantas and oneworld, accumulating a decent amount of Qantas points) I had enough points to effectively pay for my second trip. So for my first QF award flight redemption, I blew 140,000 points to fly around the world again on a oneworld award. It was worth every point. Obviously you won't have 140,000 points to blow straight away, but there are definitely benefits to collecting frequent flyer points. A domestic flight can be had for as little as 8,000 Qantas points.
If you want to get into the frequent flyer point game, then you've definitely come to the right place. And I would be happy to answer any questions you may have.