Excel is an essential tool for you to understand. The YouTube channel “Excel is Fun” is full of resources to help you learn Excel. Spreadsheets are a useful thinking tool that lets you leverage your brain to think about bigger issues more concretely.
Excel lets you keep track of things, express connections between different things, and automatically calculate and evaluate. If you hope to work in an office or laboratory after you graduate, you should probably have a basic competency with Excel or an equivalent spreadsheet program (e.g. Libre Calc, Google Sheets).