Does it mean I can “delete” myself?

Not quite. You can’t delete all your personal data whenever you want to. But you can ask to have your data deleted in a few specific situations – for example if a company or organisation no longer needs it it in order to provide the service you are using, or if you decide to withdraw your consent. However, even in such cases, companies or organisations may still have viable reasons to keep your data, for example for tax purposes or to protect themselves from possible future claims.