To send an email with Go and SendGrid in 30 seconds, you need to create a new directory, import the required dependencies, write the code, retrieve the environment variables, create a SendGrid API key, and finally run the `go run` command. The code uses the official Twilio SendGrid Golang API library to simplify interacting with SendGrid's API. It initializes email message variables, creates an email message, sends the email using a SendGrid Client object, and checks if the email was sent successfully. To use this code, you need to set up your environment variables in a `.env` file, create a SendGrid API key, and run the `go run` command.