The limit is 16 years old here. You should start it, it's a very good feeling to fly feeling the wind. It's also great to fly with planes, but when you can feel the air it makes way more awesome. I don't think it would be expensive in Germany considering how rich your country is. It's kind of expensive to buy one here, but i have friends from the US that say it's cheap (for their parameters, [cost of living and etc]) there.