Use The Dashboard
As stated on the Login page, the Dashboard is where you need to be to add Posts, add Calendar Events, Email etc. In other words this is your toolbox. All the functions and features will be discussed on their own pages.
Look at the menu on the left of the page. All the features and functions allowed at your user level are in this menu. If you hover your mouse over one of these you will see at the right edge of the box a small arrow; click that to open and see the options within. Click anywhere else on the item and the default option is launched (ex. Posts – if you click on the arrow you see ‘Edit’, ‘Add New’, ‘Post Tags’ and ‘Categories’; If you click anywhere else on ‘Posts’ the Edit Posts function is launched.)