Need some help finding ancestors.

Hello, I am quite new to Norwegian Ancestry and therefore nor very skilled in finding anyone. I have managed to go as far as - Ole Amundsen (Moen) born 1792 in Norderhovs, Buskerud, Norway, d. Apr 29, 1880 in Bancroft, Freeborn County, Minnesota, USA, his wife, - Kari Larsdatter born 1798, Norway, died Dec 25, 1893, Bancroft, Freeborn County, Minnesota, USA (Daughter pf Lars Guttormsen Solum 1769-1808, and Kari Haraldsdatter 1769 -?) I know they had one child for sure: - Gulbrand (Gilbert) Oleson (Moen) born Dec 7, 1844 in Ringerike, Buskerud, Norway, died Jul 27 1909, Outlook, Saskatchewan, Canada, he married - Anne Hansdatter (Hanson) born Dec 27 1850 in Tomt, Naes Parish, Gran, Norway, died Aug 1, 1912 in Outlook, SK, Canda (Daughter of Hans Hanson 1827 - 1912, and Kari Olsdatter Kvenvold 1829 - 1916). I belive Ole's parents might have been Amund Knudsen (1756 - 1800), and Kristie Knudsdatter (1760 - ?). I have no prof of it so I am not 100% sure. I also have no one further than that. I was wondering if anyone would be willing to help me out with finding some more ancestors of Ole and maybe the rest of his children. Or maybe someone has them in their tree as well and would be willing to share some of their knowledge and findings. Thank you, W.W.