There are many races in Nebraska in this cycle, and I know it can be hard to find the information for who is running in your area.
Here is the Secretary of State website with all of their election information:
https://sos.nebraska.gov/elections
There are also maps and lists here to act as a directory for anyone that would like.
Maps: https://sos.nebraska.gov/sites/default/files/doc/elections/Candidates/Elected_Offices_and_Maps.pdf