You can find overview maps for all stations and stops in Schleswig-Holstein here as PDF files.
On these maps you will find information as to whether and what parts of a station offer barrier-free access and what facilities there are, e.g. if there is a lift, a public restroom, or a service point. You will also see the location near the station from which rail replacement buses or taxis depart.
The legend for all stations and station maps can be found here.