Office 2016 reaches it’s end-of-life in October, so we are upgrading the version of Office on staff and patron PCs to the 2021 version. Our licensing allows us to install up to Office 2024. We decided to go with 2021, because Publisher is not included with Office 2024. We will need to upgrade to 2024 towards the end of 2026.
Office 2021 functions pretty much the same as Office 2016. You might find Microsoft's page of Office cheat sheets helpful. The middle section of “Office downloadable guides – Windows version” would be the most appropriate.
SCLS staff and a few libraries have already started using Office 2021. It should start showing up on all staff PCs in January and February. Patron PCs will start receiving Office 2021 later in the first quarter.