There are different approaches to making address labels. If the address labels are all to the same address, I recommend that you use the Avery template.
If you are using a Windows operating system, an Avery template is available for Microsoft Word. It is available from the Avery website. The Avery Template 5260 is available for Microsoft Word in .doc format.
Download it from the site. It will ask you to enter your personal information but this is optional. You can log in as Guest and enter any email address. Once entered, the file will be downloaded to your computer.
Once downloaded, provide the address in the labels. Once that is done, you are ready to print it.
If you are using a Macintosh, you can use the Avery template. It is available from the Avery website. Depending on which address labels you have, they provide different templates.
For example, if you have the Avery Template 5260, download the template for the Apple Pages.
Once you have downloaded the template, open it with Apple Pages. It should show 30 labels. Enter your name and address on each label.
After you have entered the name and address, you can print the label. That is it. Easy Peasy!
For some reason, there is no template for an address label in Google Docs. There is an option to print your address on an envelope but if you have multiple address labels, this is not an option.
I recommend you use the options listed above. There is an option to download an Add-Ons to merge with Google Sheets but why? This is more trouble than it is worth. Just use the other options.