First, log in to your Todoist account. Navigate to the settings option and look for an export feature. Use the built-in export function to download your data, typically in CSV format. Make sure to save this file in a secure location on your computer.

Open the exported CSV file using a spreadsheet program like Microsoft Excel or Google Sheets. Review the data structure and clean up any unnecessary information. Ensure that the columns are clearly labeled and that each row represents a single task entry with all necessary details (e.g., task name, due date, priority).

If you haven't already, install TiDB on your local machine or server. Follow the official TiDB installation documentation to set up the database environment. This involves downloading the TiDB server and following installation instructions specific to your operating system.

Access your TiDB instance using a command-line tool or a database management tool like DBeaver. Use the following SQL commands to create a new database and table that matches the structure of your CSV data:
```sql
CREATE DATABASE TodoistData;
USE TodoistData;
CREATE TABLE Tasks (
id INT AUTO_INCREMENT PRIMARY KEY,
task_name VARCHAR(255),
due_date DATE,
priority INT,
status VARCHAR(50)
);
```
Adjust the table schema according to the fields present in your CSV file.

Convert your CSV data into SQL insert statements. This can be done manually or by using a script. For example, you can write a Python script to read the CSV file and generate SQL insert commands:
```python
import csv

with open('todoist_export.csv', mode='r') as file:
csv_reader = csv.DictReader(file)
for row in csv_reader:
print(f"INSERT INTO Tasks (task_name, due_date, priority, status) VALUES ('{row['Task']}', '{row['Due Date']}', {row['Priority']}, '{row['Status']}');")
```
Run the script to generate SQL commands.

Copy the generated SQL insert statements from the previous step and execute them in your TiDB environment. This can be done using the command-line interface of TiDB or through a database management tool. Ensure that there are no syntax errors and that all data is correctly inserted into the table.

Once the data is loaded into TiDB, perform a series of checks to verify the integrity of the data. Query the table using:
```sql
SELECT * FROM Tasks;
```
Compare the results with your original CSV file to ensure all entries are correctly imported and that there are no discrepancies. Adjust any incorrect entries manually if needed.

By following these steps, you will have successfully moved your Todoist data into a TiDB database without the need for third-party connectors or integrations.