You can easily create a drop-down list in Excel to limit the values that can be entered in a column. Here's how to set one up ...
To create data bars in Excel, select your cells and then choose data bars from Conditional Formatting.
The best way to do this is by converting your data to an Excel table. Select your data range (A1:E11), press Ctrl + T, and click OK. Excel names it something like "Table1"; in my case, it's Table3, ...