Microsoft offers a free training center for Excel as of 2015. The database includes courses for Excel on Windows, Mac OS, Android, iOS and Windows Phone. Alternatively, users can access a help database within Excel by pressing F1 or by clicking the blue help button on the top-right.
The training center offers both written courses and video tutorials for various Excel versions. The videos are annotated and advance at a slow, easy-to-follow pace. All training content is accessible without a Microsoft account. Use the search box at the top-right to search for a tutorial on a specific feature.
Users can acquire a free trial of Microsoft Office to practice while following the tutorials. A Microsoft account and a credit card are required to download the trial.