The biggest problem is, that this actually is not cold storage.
The device you are using for cold storage has to be offline.
It doesn't matter whether you created a new profile/user. If your device is online, it effectively is an online/hot wallet.
If you truly want to use cold storage, you need a device which always is offline. Whether this is an old notebook, a mobile phone or a raspberry pi with an attached small display doesn't matter.
The point is, that it has to be offline.