This is a link to the GCFLearnfree.org series of lessons on Excel: Excel 2016. The initial lessons review techniques for opening, saving and printing documents that you learned for MS-Word. In the Topics list below, you can find links directly to basic material specific to using Excel. Feel free to explore additional topics if you wish.
You can find additional material about Excel at the Microsoft support site at Office.com.
 

Topics
Getting Started
Cell Basics
Formatting Cells
Understanding Number Formats
Introduction to Formulas