First, you need to access the CoinMarketCap API to fetch cryptocurrency data. Sign up on the CoinMarketCap website to obtain an API key. Once you have the key, you can use it to make requests to the API. Familiarize yourself with the API documentation to understand how to structure your requests based on the data you need.

Use Python's `requests` library to fetch data from the CoinMarketCap API. Construct your HTTP GET request using the appropriate endpoint and include your API key in the headers. Store the response data in a variable, ensuring you handle any potential errors or exceptions in the request process.

```python
import requests

url = "https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest"
headers = {
"Accepts": "application/json",
"X-CMC_PRO_API_KEY": "your_api_key",
}
response = requests.get(url, headers=headers)
data = response.json()
```

Once you've obtained the data, parse it to extract the necessary information. The response is typically in JSON format, so you can navigate through the JSON structure to access the data fields you're interested in. Clean the data by handling any missing values or discrepancies to prepare it for insertion into DuckDB.

```python
cryptocurrencies = data['data']
cleaned_data = [
{
'name': crypto['name'],
'symbol': crypto['symbol'],
'price': crypto['quote']['USD']['price']
}
for crypto in cryptocurrencies
]
```

Install DuckDB on your system if you haven't already. You can do this using pip:

```bash
pip install duckdb
```

Once installed, you can interact with DuckDB using its Python API or command-line interface for creating databases and tables.

Use DuckDB's Python API to create a new database and the necessary table structure to store the cryptocurrency data. Define the table schema to match the structure of your cleaned data.

```python
import duckdb

conn = duckdb.connect('cryptocurrencies.duckdb')
conn.execute('''
CREATE TABLE IF NOT EXISTS crypto_data (
name VARCHAR,
symbol VARCHAR,
price DOUBLE
)
''')
```

Use the DuckDB connection to insert the cleaned data into the database table. You can use parameterized queries to efficiently insert each record.

```python
insert_query = 'INSERT INTO crypto_data VALUES (?, ?, ?)'
for crypto in cleaned_data:
conn.execute(insert_query, (crypto['name'], crypto['symbol'], crypto['price']))
```

After inserting the data, verify that it has been correctly stored in the DuckDB table. You can do this by executing a simple SELECT query to retrieve and print some of the records.

```python
results = conn.execute('SELECT * FROM crypto_data').fetchall()
print(results)
```

This step ensures that the data transfer was successful and that the data is now accessible within DuckDB for further analysis.

By following these steps, you can efficiently move data from CoinMarketCap to DuckDB using only Python and the respective libraries, without relying on any third-party connectors or integrations.