Is the 16 GB version worth choosing over the 8 GB one?

Yes for most buyers. The 8 GB version is fine for browsing and email, but 16 GB keeps many tabs and apps running smoothly, and memory is hard to add later on an all-in-one.

Can I upgrade the memory or storage myself?

It is not a simple job. All-in-ones like this are built around a sealed chassis, so plan on buying the 16 GB and 512 GB version up front rather than upgrading later.

Only light or older titles at low settings. The integrated AMD graphics are built for video, office work and streaming, not modern games.

Does it come with a keyboard and mouse?

Lenovo typically bundles a wired or wireless keyboard and mouse with IdeaCentre all-in-ones, but check the specific listing, since bundles vary by model.

Is the screen touch-enabled?

No. The 23.8-inch 1080p panel is a standard non-touch display.

How does it compare with the HP 24 all-in-one?

They are close in size and purpose. The Lenovo offers AMD processing and a choice of 16 GB and 512 GB configurations, while HP's line leans on Intel chips; pick based on the memory and storage you need.