How did should I learn excel and how I present it on my resume?

Title- *how should I learn excel

I'm a first year clg student and I keep hearing the phrase that "excel is a necessity". I want to learn but am not finding the right courses online and am not sure which are the ones that are actually genuine. Im studying business analytics and hoping to build a career that is calculation intensive and most importantly related to finance

even tho if u don't have an ans pls do dm if you have any career advice for me