If you want to contribute to pandas for the first time...

• Read the pandas contributing guide.
• Get familiar with the pandas repository.
• Read Galuh Sahid's three-part blogpost series on making your first open source contribution.

If you want to contribute to pandas documentation...

• Read the pandas docstrings guide.
• Get familiar with docstring validation in pandas.
• Read examples of docstring errrors.
• Go through this interactive notebook to find errors that are still present in pandas docstrings.
• Watch Ong Chin Hwee's talk on contributing to pandas documentation for the first time.