How to make a PDF

On a Mac

See this support document from Apple.

From a Microsoft Office app (((Windows, Mac, web, or iPad)))

See this support document from Microsoft. Scroll down to select your operating system and which Office program you're using.

Using Adobe's free online service

Visit Adobe's free online PDF converter. Click "Select a file" to upload your document. Wait for the service to convert your document, then click "Download". Note that you may need to create a (free) Adobe account.

Using Linux printer

See this support document from Adobe.