In order to create a project, be sure that you're a member of the portfolio you'd like to make a project in.
There are two ways to create a project. First, through the Create a Project button inside your Portfolio Dashboard. And second, by hovering on the "+ Create a Project" button next to the portfolio name in the sidebar.
Project Privacy Settings (Public vs. Limited)
A Public project automatically invites all members of the portfolio automatically into that project, whereas a Limited project allows you to choose select team members to invite into that project.
Done! Your new project will appear on your dashboard.
Inviting additional members to your project
You can invite additional members and Guests to your project by clicking on the invite button in your project header.