In the summer, I'm looking to do some budget traveling across Germany, and also possibly Austria, for a couple of weeks Starting at the furthest point, and ending up in Amsterdam to get a flight back home. My main reason is to practice my German, but I also love what I've seen of Germany so far, and can't wait to see more.

I hope to go via the Bodensee/Lake Constance and Stuttgart, as I should be able to stay with friends a night or two in those places.

What I would really like is some advice about the best ways to do this.
If it is possible, I would like to get a two week rail card and a youth hostel card, and stay in youth hostels (JHB). Do you think this would be feasible and how much should I expect to pay?

Any advice or further suggestions you could give me would be greatly appreciated.

Thanks,
Linden