There is a chance that you may have accidentally touched a combination of keys, and it might have disabled the Focus Mode feature. To disable the Excel Focus Mode, press the combination keys Alt + V, ...

You can make a bar graph in Excel by first selecting the range you want to depict, and then using the dropdown menu to select the desired chart.

Software packages for charting data often offer menus; i.e., lists of charts that are available. Excel offers a menu; Tableau has Show Me! Elementary statistics and graphing books offer recipes; i.e., ...