Posting articles for Immersion.
I've tried clicking the "Upload document" button, then it takes me to this page asking me to select a free document or one I have to pay for. I choose free, and it takes me to this area with a search bar, and I have no idea what to do from there.
It's not a search bar. It's a place for you to copy and paste the link to your article. It must be an article on the internet that is in the public domain or published under a creative commons license.