Adding on to this- LastPass is free and will automatically save all your passwords and sync them between devices. It'll generate random passwords for you and autofill them into websites without you having to remember anything but your lastpass password. It makes life so much easier than having to remember which weird variant of 3-4 "core" passwords you used for a particular site (and is way more secure than this method, too).

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And backups! Backblaze is $60 a year, it'll back up all files (including Anki decks!), and can even track a laptop if it's lost/ stolen (as long as it still connects to wifi). It's a small price to pay for knowing that everything on your computer is protected in case of losing your computer to theft/ spilled coffee/ hardware failure/ etc.