I am looking for a wordpress plugin that allows people to register for a class/training, maybe even an event.

At the moment I am using a Gravity Forms form on a page and it allows users to register for a training class.

It would be better if I could have some text about the program and then a form for them to register with. Or even a link for users to click on to take them through the registration steps.

Is there anyway to set up a username and password for people registering for something such as a class?
This way I could have a database of people signing up for a class. They would register for themselves and then be able to register for the classes under their own portals. Similar to what I have below in the image example.