Rethink the placement of warnings on the installation instructions

During #18784 (closed), none of the 4 test participants read the warnings while waiting for the download. The fact that I was observing them and asking them concrete tasks might have created an artificial situation that prevented this. Still, 2 people navigated out of the installation instructions to the /about to answer my question about metadata.

So, I wonder if we could still improve the placement of the warnings on the installation instructions, for example:

1. Right now the warnings are in-between 2 clear actions (download and verify). Maybe it would help to put all the informative content first (overview and warnings) and then only all the actions (download, verify, and install).
2. We could then add some JS magic to display the rest of the instructions only after clicking a button below the overview and the warnings.