Work requests are submitted via work request forms in Workflow. Available work request forms you have permission to submit will display when you request a project. To request a project, hover over the + icon by Projects > Requests > Submit request, then select the appropriate work request form for your project from the list.
After your request has been submitted, you'll be taken to your submitted requests page where you can select a submitted project and collaborate with approvers by adding comments.
In progress projects display in the Projects menu > In progress. From there, you can see more details about each project.
If you no longer need a project created, simply cancel the request from the page.