Tasks and subtasks

What I did: I have a category in a project that has multiple steps in it. I would liek to have each step include main tasks with subtasks. Is this possible?

What happened:I was not able to do this.

What I expected:

Things that might be helpful to know (Agenda version, OS and model, etc):

Can you send us a series of screenshots of what you describe? Even if it’s just of a quick sample note and not the actual note (in case it’s sensitive)