I concur that finding a local stamp club or local stamp show may be of benefit. Some options I found in your general vicinity...
Second Sunday Bourse, 2nd Sunday of each month, Maplewood Community Center
Minnesota Stamp Expo, July 19-21, 2024, Crystal, MN,
www.MnStampExpo.orgTwin Cities Philatelic Society
Granite City Stamp Show, April 20, 2024, St Joseph, MN,
www.StCloudStampClub.orgNorthern Philatelic Society & Library, Minneapolis,
www.NorPS.orgDealer: Golden Valley Stamps & Coins
Overall, I did not spot rare content in your photographs, though I feel it is beyond an early beginner's collection. It would be nice if you knew someone who had established a collection in recent years and wanted to expand it. Personally, I think the ration stamps were the most interesting aspect.