To start raising funds as a fundraiser for a charity you care about, search for the charity's profile on GivenGain (top search bar), open one of their charity campaigns and click on the "Start fundraising" button.
Alternatively, first register your fundraiser account at givengain.com/join, then select the "Fundraiser projects" tab of your account and click on "Create a project". Search for a new charity campaign and complete the process.
Tip: Upload an image and/or video on your project page to make your fundraising idea more attractive to your donors.
You can also use this guide to help you get going!