You can follow the step by step of storing Bitcoin safely from many tutorials. You don't have to worry because of quantum computers because as long as you can take care of your wallet, there is nothing bad happen. No need to be too afraid of that but you can search and read other info how to protect your Bitcoin in your wallet. You need have much knowledge so you will know how to secure your wallet so that will be safe from bad thing. I am sure experts will share more things about securing a wallet in the middle of quantum computers so there is no way your wallet compromise if you can take care with good.
Wallet security doesn't matter in this case. In the
near future, QC may take over your coins by deriving the private key from the public key.
Bitcoin devs are working tirelessly to see how the can create a quantum resistant script. BIP360 will solve the problem of bitcoin being vulnerable to quantum computer. Don't you think that it's good that bitcoin moves from from ECDSA/Schnorr signatures. BIP360 is the implementation of post-quantum (PQ) output type. P2QRH will get rid of quantum computer attack, because you have to move your coins from legacy address to P2QRH for the safety of your funds. So take a chill pill and watch how this new development is being achieved.