I mean there are no public keys exposed on the blockchain. Obviously this is not a threat now, but someday it might be, and once the attack starts, everyone is going to be rushing to move (plus the attackers attempting to out-bid).
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Not sure what sort of wallet you are using, but most wallets generate a new key for each address. So as long as you aren't refusing addresses, your public keys shouldn't be exposed (unless it is a taproot address because taproot addresses already have exposed pubkeys). You can still spend from the wallet without exposing the public keys of your coins at rest.
And whatever your signing device/multisig etc. setup is, it’s good to practice sending and broadcasting, so that if you have to move funds, you know what to do. A bit like a fire evacuation drill of sorts.
you can always practice with another wallet/key (same signing device). Or sign messages or sign a transaction that you don't broadcast. The idea is to just not have any public key on the blockchain associated with your main/large stash.
Everyone should be in the habit of semi-regular signing (and recovery, tx validation, address checks, etc)
Personally, I don't think about the quantum threat at all. P2WPKH doesn't protect your coins, it just delays when the attacker learns the public key.