Once you create the form and you want your team to be able to submit the form and start the workflow, you need to make the form submittable.
The Submit Page
The Submit page displays a convenient list of all the available workflow forms to logged in users. Users can initiate workflows by submitting forms from this page just as they can from any page on the site. This is what it looks like in the Admin UI:
This page is mostly useful for sites that use only the Admin UI (users are logged in) .
Note that the Submit page menu item will only appear when an administrator has published at least one workflow form in the Workflow Settings page.