The IDE is shown in the figure below, although the information displayed in the large pane will be different.
The large pane is where your solutions and projects will be opened. At the moment, this shows the Start Page, with up-to-date information on Visual Studio. When you start work, this pane is where your code is displayed.
The pane at the bottom is the Output window, where messages from the IDE and Compiler are displayed.
The right-hand pane is the Solution Explorer, which displays the structure of your solution and projects. At the bottom of the Solution Explorer pane are some tabs. Solution Explorer appears by default.
If any of these panes is hidden, you can show it from the View menu.