First, ensure your development environment is ready. Install Node.js and npm on your machine as these tools will be used for script execution. You can download them from the official Node.js website. Additionally, ensure you have a code editor like Visual Studio Code.

Sign up at the News API website and navigate to your account dashboard to generate an API key. This key will be used to authenticate your requests to the News API and access news data.

Go to the Google Cloud Console and create a new project. Enable Firestore by navigating to Firestore in the console and setting it up in Native mode. Follow the prompts to complete the setup process. Ensure you have the necessary permissions to read and write data in Firestore.

In your project directory, initialize a Node.js project using `npm init`. Then, install the Firebase Admin SDK with the command:
```
npm install firebase-admin
```
This SDK will allow you to interact with Firestore from your Node.js script.

Go to the Firebase Console, select your project, and navigate to the Project Settings. Under the "Service accounts" tab, generate a new private key for the Firebase Admin SDK. Download the JSON file and store it securely. In your script, initialize the Firebase Admin SDK using this key:
```javascript
const admin = require('firebase-admin');
const serviceAccount = require('./path-to-your-key.json');
admin.initializeApp({
credential: admin.credential.cert(serviceAccount)
});
const db = admin.firestore();
```

Use a library like `axios` to make HTTP requests to the News API. Install it using:
```
npm install axios
```
Then, write a function to fetch data:
```javascript
const axios = require('axios');
async function fetchNewsData() {
const response = await axios.get('https://newsapi.org/v2/top-headlines', {
params: {
country: 'us',
apiKey: 'YOUR_NEWS_API_KEY'
}
});
return response.data.articles;
}
```

Once you have the news data, iterate over it and store each article in Firestore. Use Firestore's batch writing for efficiency:
```javascript
async function storeNewsInFirestore(articles) {
const batch = db.batch();
articles.forEach((article, index) => {
const docRef = db.collection('news').doc(`article-${index}`);
batch.set(docRef, article);
});
await batch.commit();
console.log('Data successfully stored in Firestore!');
}
(async () => {
const articles = await fetchNewsData();
await storeNewsInFirestore(articles);
})();
```
Follow these steps to efficiently move data from the News API to Google Firestore without relying on third-party connectors or integrations.