Cannot open my eMail Client home page or locate the folders. I am stuck on Calander.

Windows 10 mail   eMail client

Right-click on the Calendar Tab, and select the others you want to view.

Got my mail opened okay. What do I click to get into all of the folders?

Sorry, my screenshot was not so clear as to where that was. In the left-most column, right-click on one of the tabs. i.e. right-click on Mail or Calendar. That will give you the option of which tabs to display.