Drawing is REALLY GOOD to know. I’m not a pro, but I’ve been studying this for a while… and not being able to draw well, yet, is the biggest thing keeping me back.
And you know what else is cool about drawing? It’s much easier to find people who can teach you to draw, than it is to find 3D schools.
Another thing - you “don’t have much time” for it. Well, you’re 15. You don’t have to be a pro tomorrow. Spend some time practicing this stuff every week, and in a few years you’ll be pretty good. Maybe not good enough to be a pro, but you love to do it any way, so why not?
As for the “no companies” thing… Starting looking into advertising. There should be advertising companies in Austria, and if it’s true that there are no school teaching this, then they don’t have many people to choose from. If you ever see an ad in TV and think “I can do that”, DO IT… then ask people (perhaps here) if it’s as good as you think it is… and then send links of your video it to the companies that make those ads.