Another way to use a spreadsheet program that has become popular is to re-create 8-bit graphics from childhood video games and turn them into larger-than-life scenes. It‘s very simple to adjust the row and column height so that it becomes a perfect square, and most of the 8-bit games lacked any sort of definition, shading, or blending making them even easier to turn into spreadsheet art. There is also a huge market for this sort of thing. People that grew up with those types of games are now into adulthood, and many of them love to share things from their past with their children, nieces, nephews, and anyone else that cares about it. There is a certain amount of whimsy to these characters as well, and this type of classicism will never truly go out of style.
Overall most people tend to learn better this way rather than trying to learn all Excel formulas at the same time as this can be very confusing. Most of us tend to learn in smaller packages of information and you should look for a course of instruction that will allow you to do this. As you are learning to use Excel you should of course start by learning to use the formulas that you are actually using or are likely to have need of in the immediate future.