I need help with downloading Jenkins properly

For the love of me I cannot for whatever reason get Jenkins to work on Ubuntu. I have created new instances, I have uninstalled and reinstalled several times. When I download it and get to the create new user admin page it never goes through once I save and continue. If I choose the skip option, the functionality wont work. I try to do Maven or Sonarqube and I keep getting error messages. I dont know whats wrong. Can anyone help?