afaik there’s no public list of package mirrors

https://www.debian.org/mirror/list

I recently helped a friend install Debian via sms, it was surprisingly easy, and she had never tried installing Linux before. When installing on a laptop I’d recommend using cable instead of wifi, and then setup wifi when the system is up and running.

Best of luck

I’m using two pi-zero-w to monitor our garage and boiler-room, works like a charm, you can even install a lightweight webserver like lighttpd and setup a livestream