You will find instructions on how to use OnionShare. Look through all of the sections first to see if anything answers your questions.
If it isn't on the website, please check the GitHub issues. It's possible someone else has encountered the same problem and either raised it with the developers, or maybe even posted a solution.
If you are unable to find a solution, or wish to ask a question or suggest a new feature, please submit an issue. This requires creating a GitHub account.
See :ref:`collaborating` on how to join the Keybase team used to discuss the project.