“Lokalhistoriewiki” is an excellent place to start your research. “lokalhistoriewiki.no” is a wiki run by the Norwegian Local History Institute (NLI) at the National Library. The theme is local history and you will find articles about people and places, artifacts, pictures, history, organizations and genealogical subjects. Most of it of interest to the genealogist.
Here is an example, if you would like to know more about sponsors/godparent; https://lokalhistoriewiki.no/wiki/Leksikon:Fadder. Remember that you can use “google” to translate Norwegian text into English.
Genealogical research in Norway 