To create a new discussion, click the ‘Create a Discussion’ button in the top-right-hand corner of the Home or Explore page. You will be asked to provide a title for your discussion, which will also act as the starting thesis if you are creating a single-thesis discussion (see: Multi- vs Single-Thesis Discussions). Both can be changed later. You will also be able to set the language of your discussion, which will affect what searches it shows up in.
Click on the ‘Next’ button, and you will be taken to the next screen, where you will be asked whether you would like to create a single- or a multi-thesis discussion (see: Multi- vs Single-Thesis Discussions). Click on the ‘Next’ button again, and you’ll be given the option of uploading a cover image for your discussion (see: Adding Tags and Images) - note that you can come back and do this later. Finally, click the ‘Create’ button to create your new discussion.
Note that new discussion are set to private by default. To publish your discussion, see Published vs Private Discussions.