It’s general education only. Use it as a checklist and always follow your provider’s official security guidance.
No. It saves your checklist in your browser (localStorage) on this device only.
Start with your email account (password resets) and then move to banking and social accounts.
If you can, prefer an authenticator app or passkeys. SMS can still help, but it’s weaker against SIM swap.
Change email password first, sign out all sessions, enable MFA, and contact your providers—especially your bank.