Change SSO landing page OR edit stock navigation menu

[Jayson Larner]

Very new to Jira so please bear with me as I just inherited this.  I have a non-SSO login link for https://helpdesk.company.org/login.jsp?nosso which works for anyone not on SSO (this is needed for a function of our clients).  Once logged in, the user goes right to the system dashboard.  Can I change this to automatically take them to a different page and if so, where do I do that at?  

Additionally, using what I believe is the stock Jira Navigation Menu top bar, can I edit the links that are up there?  I have a create button but that loads to a generic create ticket and i would like to have that go to a landing page that my SSO users see.

Thanks.

Jayson