There are several online forums where you can talk to others about pregnancy and childbirth and get helpful information:
Schwanger-online: www.schwanger-online.de/forum/
Eltern: www.eltern.de/foren/
Mama-Community: www.mamacommunity.de/forum
Mamis-Online: www.mamis.online
Babyclub.de: www.babyclub.de/community/foren/
Ratgeber-Forum für Eltern: http://www.elternforen.com/
The platform netmoms (www.netmoms.de/gruppen) offers the opportunity to find groups near your home and establish personal contacts.