Once you are logged into your account, simply go on the top of your screen and click on "Create a Campaign" if your profile is an Organization.
If you are an Individual, it is the same procedure, except that the button shows "Create a Community Project".
Then simply follow the instructions and fill all the fields marked with a red star.
Don't forget to save your progess.
As long as you're not finished with filling all the information, you can go back to the process through your Main Menu, click on the "Dashboard" button.
IMPORTANT : Keep in mind that you'll need your Stripe credentials before being able to submit your Campaign or your Community Project.