Summarize the following:
Go to https://docs.google.com/spreadsheets/ in your browser. This will open a list of your Google spreadsheets if you're logged into your Google account. If you aren't logged into your Google account, you'll be prompted to sign in with your Google email address and password first. Click the Google spreadsheet that you want to edit. You may have to scroll down to find the right one. If you haven't yet created the spreadsheet that you want to alphabetize, first click Blank and then enter your data before continuing. Click the top cell in your data's column, then drag the mouse down to the last full cell in that column. This will highlight the data in this column. You can only sort one column at a time if you don't want to rearrange other parts of the spreadsheet to correlate with your rearranged column. It's near the top of the page. Doing so prompts a drop-down menu. Click one of the following options:   Sort range by column [Letter], A → Z - Sorts your selected data into alphabetical order, but leaves the rest of the spreadsheet as it is.  Sort sheet by column [Letter], A → Z - Sorts your column in alphabetical order and adjusts the rest of the spreadsheet to correlate with the re-sorted data. Your selected data should now be rearranged into alphabetical order. If you don't like the results or you accidentally clicked the wrong option, press Ctrl+Z (Windows) or ⌘ Command+Z (Mac) to undo the sorting.

Summary:
Open the Google Sheets site. Select a Google spreadsheet. Select the data you want to sort. Click the Data tab. Select a sort option. Review the results.