Even before anything else, you should change your DNS from your ISP to one of the many third party, respected, fast resolvers. Clooudflare 1.1.1.1, Quad9 9.9.9.9, both do not log and are free. There are many others.

I use the paid $1.99 USD/mo NextDNS with malware-only blocking on my router, and malware, ads, trackers blocking on my Android devices, Linux desktop and Windows desktop.

My first compsci course was on a PDP/11. On RSTS/E. On a paper teleprinter console.

Good times.