To insert an in-cell picture saved on your device, from Microsoft's gallery, or imported through the web images search, first ...
Combining Ctrl + Shift + Arrow keys lets you extend your selection in any direction until Excel hits a blank cell. Start from the top-left corner of your data, try Ctrl + Shift + Right Arrow, then ...
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.