The front of the handout looks fine. Turn the sheet over, and the second page is upside down. Before changing the document, check how the printer expects you to turn the paper. Using both sides and choosing the right turning edge are separate decisions.
Make a sample you can read either way
Create a two-page test document. Put “1 — FRONT” on the first page and “2 — BACK” on the second, with a large upward arrow on each. Use the same paper size, orientation and printer as the real job. Print just those two pages on one sheet, then turn it as a reader would.
If the back is inverted, change the duplex turning option and repeat the sample. Controls often describe a long or short binding edge. Think about the physical sheet: a book turns at the side, while a top-bound pad turns upward. Portrait and landscape orientation change which edge serves that purpose. Follow your printer's preview and instructions rather than relying on a remembered setting from another job.
Manual duplex needs a feeding test too
In desktop Word, look under File → Print for two-sided options. Their availability depends on the printer and driver. Microsoft also describes manual duplex, where Word prompts you to reinsert the sheets.
For manual printing, follow the printer's instructions for which face goes up and which edge enters first. Test with a spare sheet suitable for the printer; do not commit a large stack until the result is right. Finally, print a short section of the real document. Mixed portrait and landscape pages deserve another check before the full run.