Search online for a secure password manager similar to Bitwarden. These password managers store all your passwords for you and can also generate secure passwords for you to use. You basically then only use and have to remember one "master password".
I prefer Bitwarden, but make sure you do some research on the one you choose to make sure the manager is secure, encrypted, and protected. (normally best practice to avoid using the default password managers that come with your web browsers).
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