1) How can I modify the Board under my project?
2) Some assigned Users no longer work for the Company so how can I assign a different User to a specific status column?
3) How can I remove a specific status column that is no longer needed?
4) How do I crate New status columns?
5) Can I setup a meeting with a tech support person for Atlassian that could walk me thru this process and assist with questions?
Ok, so I think there's some confusion as to what a board is here, but let's start with direct answers:
Start with https://support.atlassian.com/jira-work-management/docs/monitor-your-work-with-the-board/ and then https://support.atlassian.com/jira-work-management/docs/workflows-and-statuses-for-the-board/ for the focus on the columns/workflow interaction