PSE 2021.3 Update, Slow Internet Advice/Questions

Hi!

I just installed Mac PSE 2021 from DVD, and would like to update to 2021.3. I would like to get some advice beforehand, because I have a very slow Internet connection. In the "before times", I would just download a standalone updater on another computer with a fast connection, but that doesn't seem to be an option. I tried installing the trial version, but it isn't the most recent version.

How big is the update? The update message doesn't tell me how big the download is. I would like to know, becuase it can mean the difference between leaving it to download overnight... or DAYS (a non-starter if it's that big).

If I start the download, can I pause/resume or cancel it? I can't have it downloading in the background if I need to do something else with the Internet. I don't have the bandwidth.

If I have to cancel, will it resume where it left off, or will I start over from the beginning?