Get your Bitcoin private keys and public keys in your Bitcoin wallet, since you are using Core, you can export or see your private keys there.
You need QR code (for easy to use, just scan the QR code and no need to manually input your public keys/private keys) for your public keys for your receiving address and private keys also for spending the balance of your wallet.

You just need to know that, there are pros and cons of using a paper wallet.