Begin by understanding the xkcd data structure. xkcd is a webcomic, and its data is available in JSON format via an API. You can access a specific comic's data by using the URL `https://xkcd.com/[comic_number]/info.0.json`, where `[comic_number]` is the number of the comic. Familiarize yourself with the JSON structure, which typically includes fields like `num`, `title`, `img`, and `alt`.

Write a script using a programming language like Python to fetch data from the xkcd API. Use the `requests` library to make HTTP GET requests to the API. For example:
```python
import requests

response = requests.get('https://xkcd.com/info.0.json')
data = response.json()
```
This will fetch the latest comic's data. You can iterate over comic numbers to fetch multiple comics if needed.

Once you have the data, transform it to match the schema requirements of your Teradata table. This may involve selecting specific fields, renaming them, or converting data types. Ensure that the data fits the constraints and types expected by Teradata. Use Python to manipulate the JSON object and prepare it for insertion.

Ensure that you have access to a Teradata environment, either locally or remotely. You need to have the necessary privileges to create tables and insert data. Verify that the Teradata client tools are installed on your system, and ensure that the Teradata database can be accessed from your network.

Use SQL to create a table in Teradata that matches the structure of the transformed xkcd data. Connect to your Teradata environment using a command-line tool or a SQL client like Teradata SQL Assistant. Here is an example SQL command:
```sql
CREATE TABLE xkcd_comics (
comic_number INTEGER,
title VARCHAR(255),
image_url VARCHAR(255),
alt_text VARCHAR(500)
);
```
Adjust the data types and sizes as needed based on your transformed data.

Use Teradata's BTEQ (Basic Teradata Query) tool to load data into your Teradata table. Create a `.bteq` script file containing the SQL `INSERT` statements generated from your transformed data. Run the BTEQ script from the command line:
```bash
bteq < your_script.bteq
```
Ensure that your script includes connection details and correct SQL syntax to insert each record into the table.

After loading the data, verify that it was successfully transferred by querying the Teradata table. Use SQL commands like `SELECT * FROM xkcd_comics;` to check the contents of the table. Ensure that the data matches what was extracted and transformed from the xkcd API. If discrepancies are found, debug the transformation and loading process as needed.

By following these steps, you successfully move data from xkcd to Teradata without using third-party connectors or integrations.