buying a hardware wallet does't mean your coins are safer.
True if you buy cheap hardware wallets because such devices have back doors for example Trezor-clones.
that's right. i was planning to buy a trezor but didn't do so as it is not offline.
You don't need to be completely offline to be secure. If you have the knowledge "how to protect your PC", it is enough. However, being offline is better.
that's why i bought a few thumb drives to store my backups. that's really offline as they are not connected with the net.
So how do you spend from it? Import the private key into an online machine and spend? Sign tx and push it from an online PC? Can you please tell?