Im very paranoid about getting into piracy and im not sure if i should or it or not but there are so many things i want that i cant afford.
is there a secure linux os that i can use without a vpn? im pretty use to windows 10 but i was told linux mint is good for this kind of stuff, is that true?
piracy is not that deep… the OS doesn't really matter in this case as what you're concerned about is the ISP, not anything in your own PC. if you don't have a VPN, your ISP could send letters bugging you for downloading stuff. you'd probably have to get dozens of letters before the ISP would cancel your service.
just get a VPN for $5/month and you don't have to worry about it.
Your advice on ISPs is jurisdiction specific. As an example, in Germany and some other countries, you have private law firms involved, tracking down people with the help of the courts, shaking people down with threats of civil lawsuits. VPNs good, though.