There are many ways to contribute to OSM, the best is simply to add the information and fix problems yourself.
See http://www.openstreetmap.org/fixthemap
The first two chapters of http://learnosm.org/en/beginner/start-osm/ give a good instruction to the very basics, please be sure to watch the introduction to the iD editor video.
If you take lots of photographs you should investigate if you can add geographic coordinates to them, either directly with the cameras or by recording the positions with a seperate device. However, at least for me, there is a big difference between taking a snapshot, typically with a mobile phone, for surveying purposes and a photograph that I would want to show somebody else.
A further possibility is to contribute to mapillary.com the photographs and sequences stored there are available to OSM contributors for improving our map data.
The best way to locate mappers nearby is http://resultmaps.neis-one.org/oooc?zoom=10&lat=40.92312&lon=-100.16213&layers=B00TFFFFFT however as you will see, you are fairly on your own in Nebraska. You should in any case subscribe to the US mailing list https://lists.openstreetmap.org/listinfo/talk-us
US OpenStreetMap peculiarity: the street network in the US was imported from a public data source "TIGER" very early on. Unluckily the in many places the net result was not particularly good, the good news is that while a lot of Gothenburg seems to be untouched TIGER data, it does seems to be of reasonably reasonable quality. Likely however there are lots of details (shops, facitilies, buildings, addresses, turn restrictions) that are missing and/or out of date.