Hallo Kenan, if you are tecnically interested, and like to help other people, may be the Freiwillige Feuerwehr (voluntary firebrigade) could be interesting for you. In the most towns of Germany fireworkers work as volunteers and get a free training for that. Sometimes it may seem a little bit like a military-system with uniforms and so on, but normally you find interesting people, helping each other and looking for new volunteers. You should contact the "Wehrführer" by mail – and in german, because they will be more reserved (and eventually afraid you will not learn enough german to understand orders and trainig….), if you write in english.
Here are some more Informations about Firebrigades in Germany and Rheinland-Pfalz:
If they don´t answer you, I can give you an other adress in Koblenz, not far away, leave a massage here.
And if you are not so interested in learning to be a fireworker: In germany we have a lot of Vereine (associacions or clubs) for everything like sport, red cross and so on. The most of them look for new members and voluntary helpers. Look here: http://www.muelheim-kaerlich.de/vereinsregister.html?no_cache=1
And: In your Heim (shelter) should work a Sozialarbeiter (socialworker), perhaps he has some more informations. Good luck and best regards, Heide