Honestly, you’d be better trying out a Live Linux OS that runs from USB stick.
The ISP will still see what sites you go to, but they can’t see what you’re actually doing on that website as long as the website enforces https
As long as you’re not going onto a drug-dealing or credit-card sharing forum, the ISP won’t give a damn.
Copyright streaming a .i.e. anime — the ISP can’t tell what it is.
Torrenting an anime however, that can’t be anonymous — as copyright enforcers may be logging IP addresses
2 browser changes you can install to enforce this. Install a https every plugin, and change Firefox to use DoH in settings (DNS over HTTPS)
The problem is that USB live sessions are dynamic — everything is lost when you reboot.
You want a distro that can be made persistent — i.e. changes are written to the free space on the USB stick
Be aware that USB sticks aren’t particularly robust — a lot of writing to the stick will eventually cause it to fail, so don’t misplace passwords or anything.
This is not foolproof nor anonymous, but it’s more to deter casual parent or ISP snooping.
Nothing is perfect, but it’s probably good enough.
Just don’t use this for illegal sites like drugs or card sharing
TOR is indeed the superior option — but it leaves traces on your PC that it was used — you might want to look at TAILS instead — this is another Linux OS that runs from USB but is designed around anonymity and routes everything possible over TOR — not just the web browser.
It, too, can have a persistent storage area — a small encrypted partition you can store passwords, bookmarks etc in.
Tails - Persistent Storage — there are a few vids on YouTube about it too.