a VPN will let you go onto any app you want, we don't know how safe it is, so proceed with caution
on a not school issued device, download chromium (or firefox [untested]), make sure it is a portable version, like from portableapps.com
put the .exe onto your onedrive or google drive if it is installed on your school laptop (company portal)
open with school laptop
install vpn extension (will add later)
hopefully all goes well and you can view websites