Computers have only really become a widely accepted medium for art within the last twenty years, and in the field of movies and animation, most people couldn‘t live without it. It has made editing a much easier and faster process, and has completely revolutionized the way animation is created. There are many digital artists appearing more and more often that use various computer programs to help them to create their art work, and people are now trying to push the envelope on what programs can actually be used to create viable pieces of art.
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.