Crypto Wallet Security for People Who Are Not Technical

A crypto wallet does not hold coins. It holds keys, and whoever holds the keys controls the money, which is why almost every crypto loss reported to police is a key problem rather than hacking. The one rule that never changes: the recovery phrase is never typed into anything but the wallet app itself, and never shown to another person. Most people reading this do not need a wallet at all, and that is a good answer.
What does a wallet actually store?
A wallet stores a private key and the software