How to stop network spyware with Qubes OS?

i have an untrusted network (router is isp, wap is google, virus on my moms computer) i cant chnage stuff bc its not my network (when i ask my mom if i can remove the virus she says im trying to spy on her even tho the virus is spyware lol)

i can only change things on device

wold this be good enough to stop network spyware? (1st and 3rd party) (with good vpn)

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