There are Internet platforms where people with disabilities or their relatives can find information and exchange forums or chat rooms with those affected. Many caritative facilities also organize meetings for people with disabilities.
Self-help groups exist for different types of disabilities.
Baden-Württemberg:
Gemeinsam leben – gemeinsam lernen - Landesarbeitsgemeinschaft Baden-Württemberg e.V.: http://www.lag-bw.de/sprache.html
Verein Rückenwind: http://www.rueckenwind-es.de/
Intakt: http://www.intakt.info/forum/forum
LAG Selbsthilfe: https://www.lag-selbsthilfe-bw.de/mitgliedsverbaende/