Re: "Cannot sign in to Apple Music Classical on Windows browsers" "The web page also tells me to "Get the App built for Classical", which I would guess makes no sense for windows".
Am no expert, yet Apple provide documentation with all the "how to" info., and tips.
The way I understand it, we need to install the classical music app on a phone.or an iPad.
Classical Music downloaded using the app can then be synced to a computer ... I may be wrong.
Both Music apps can be linked.
"Availability of the Apple Music Classical app may vary by country or region. Learn what’s available in your country or region. Apple Music Classical features and content may also vary by country or region."
More info: Install the Apple Music Classical app - Apple Support
Eg: says:
"You can install Apple Music Classical on any iPhone with iOS 16 or later, or any iPad with iPadOS 16 or later".
and
"You can install Apple Music Classical on any Android device with Android 9.0 (Pie) or later.
After you install the Apple Music Classical app, you need to install the Apple Music app and connect the two apps.
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Resource: for iPhone, iPad, Android and the web Apple Music Classical User Guide - Apple Support
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Re: "So if I can't get this to work need to cancel trial period"
NB: We need to cancel a free trial at least 24 hours before the trial period ends, if we choose not to be charged for the following subscription period. (We lose access immediately on cancellation).
How to cancel Apple Music - Apple Support
Apple Music User Guide for Windows - Apple Support
Music Support Website: (info. / support / contact options etc. ) Music - Official Apple Support