Excel makes it easy to crunch numbers. With Excel, you can streamline data entry with AutoFill. Then, get chart recommendations based on your data, and create them with one click. Or easily spot trends and patterns with data bars, color coding, and icons.

Create a workbook

1. Open Excel.

2. Select Blank workbook.

   Or press Ctrl+N.

Enter data

To manually enter data:

1. Select an empty cell, such as A1, and then type text or a number.

2. Press Enter or Tab to move to the next cell.

To fill data in a series:

1. Enter the beginning of the series in two cells: such as Jan and Feb; or 2014 and 2015.

2. Select the two cells containing the series, and then drag the fill handle  across or down the cells.

Copied from: https://support.microsoft.com/en-us/office/what-is-excel-94b00f50-5896-479c-b0c5-ff74603b35a3