Everything on this device is a local imitation: the mail, the texts, and every website, including sign-in pages that look like real companies. Nothing you type is sent anywhere.
LinkSnitch is on. It speaks when a link's address has a discrepancy with where the link seems to go, and stays quiet otherwise. Use the mail, texts, and browser as you normally would.
Using a screen reader: flagged links carry their announcement as the link description. Without one: turn on the built-in voice in the LinkSnitch panel's Settings. Alt+L opens the panel, Control stops the voice, Escape goes back. This tab is your own session; a new tab starts a fresh one.