>Do not do this. It's just crappy security practice.
>Password managers give you versions & history (you need to rotate passwords occasionally), a TOTP generator+seed store, configurable password generator using a schemes of characters (some websites only allow specific characters), is encrypted at rest & in memory so it's more secure than a piece of paper in your wallet, is backed up online, and of course you only have to memorize one master password. (use BitWarden or 1Password, the rest have downsides/limitations)
This depends a lot on your threat model. You basically have three options for password managin, paper, cloud (eg. bitwarden), local (eg. keepass).
Paper is mainly vulnerable to people in your life, government, etc. But your passwords can is safe from malware, digital exploits and so on. The vulnerabilities can be reduced by using a second factor that must be combined with the information in the notebook. The biggest problem with the paper approach is probably accidental loss. It's much more difficult to make backups.
Cloud password managers have plenty of issues. I'll let the LastPass security incident section on Wikipedia speak for itself[0]
Local password managers work, but there are plenty of potential vulnerabilities: Rogue developers, attacks on the development supply chain, local malware, etc. Some of this could be reduced by accessing passwords only in sandboxed OSes. However, nobody does that.
In the end most people end up relying on not being a big target. These methods all work for most people, as long as they aren't the target of a nation state or other big actor.
[0]: https://en.wikipedia.org/wiki/LastPass#Security_incidents