1. Use a hardware wallet. If you can't afford one, make sure your PC is clean and use an open source desktop wallet (e.g Electrum) that give you control over your private keys.
I can't believe how some people actually buy hardware wallets but save their seed on a .txt/word file
Why would that be risky? If there's no internet connection on a clean pc and put it into a usb-stick? One back-up and put them into a safe location.