Thanks for posting your query in PSC and heartily welcome to your colleagues to PRPC world. :)
Can you refer PEGA PLATFORM FOUNDATION (7.2) course from Pega Academy? This course has lesson 'The Pega Platform' which has a demo showcasing Designer Studio and Pega Express. Also, refer the lesson 'Creating User Forms' in the same course. This informs about creating end user forms with an exercise system (refer the lesson for credentials and URL to access).