School computers are riddled with spyware & proprietary software, the fact that they use windows is bad enough, but then you are forced to use edge or chrome and other proprietary software and often you are blocked from installing open source alternatives like librewolf or duck duck go may be blocked.
What I am asking is, how can we get around this, do i just need to bring my own laptop using FOSS privacy respecting software. or is there another way around this. Thanks for the help.
That's the point of school and company computers. To keep all the nasty software you need for your work away from your personal laptop, which you'll want to buy yourself.
No amount of privacy-friendly software you install on top of Windows thoroughly compromised with corporate MDM is going to save you.
If you must use your personal machine during work hours, tether it to your phone's data connection or use VPN if it is allowed.