There is no better guide well suited for users that is secure and simple like the one @mk4 mentioned. There is no need to over-complicate things.
But for ordinary users, multi-signing is a high threshold and difficult to complete. So, is there a tool that can "lock" your wallet?
This "lock" does not review incoming assets, but only reviews assets when they flow out. It can be a secondary password, or a fingerprint verification. This "lock" must follow the address, not a single wallet. As you can imagine, even if the thief logs in to the wallet with the private key from another place, the "lock" existing in the address is still in effect. It may be able to steal your private key, but it cannot steal your secondary password or physical characteristics.
Is this "lock" technically difficult to implement?
There is no such feature. Even if there was, it needs to be implemented at the protocol level and not even via the wallet. And also, I'm not sure there is a cryptographic algorithm that supports such. But if you're a dev and want to take it up a notch, you can create a smart contract wallet that not only takes a valid signature and incorporate some kind of luck into it.
In practice, I haven't seen this being used but it might be a solution for you because multisig wallets are smart contracts themselves.
The best wallet security right now is still to get a hardware wallet and make sure the hardware wallet is never used as a hot wallet (ie connecting the hardware wallet directly to dapps).
Btw, Sorry about the loss of your assets.