Hi Samuel, sorry for the late answer.
To contribute to Org, you can send patches to the mailing list: maintainers will review and hopefully accept them. Once you have several patches accepted and are comfortable pushing changes directly to the Org repository, we will consider giving you write access. But for occasional bug fixing, this is not needed. See https://orgmode.org/worg/org-contribute.html for more and let us know if this answers your question. Best, -- Bastien
