There are multiple ways you can share your project. Please note that if you want to share a project, its visibility has to be set to Unlisted or Public. You can do this in My Discover section by clicking the icon on the project you want to edit and changing the setting in the Edit menu.
Then, you will be able to share your project by either copying the CODE and sending it to the people you want to share the project with or by sending them a direct link which you can get by tapping the Export icon in the Edit menu. You can also get the link directly from the project page by tapping the Export icon and copying the link.