Quinn,
For the next steps questions it is important to understand how PMI sees the flow of work when working on a project. For this you can refer to the process groups, knowledge areas and processes to understand the inputs and outputs of each activity. For example, to produce a project schedule you would need to estimate durations for each activity before setting beginning and end dates. Even within each process there are specific steps that PMI sees as best practices. Although ITTOs seem to be a thing of the past in today's PMP exam, they are not completely obsolete, so I would still learn the general idea behind the processes.
For the who questions, you will need to understand clearly the role of each person in a project. This can only be learned by studying the most common roles in a project and what people are accountable and responsible for. Practice, practice, practice. The best way to get familiar and truly grasp the steps and roles in projects, especially if you're on a time crunch to study for your exam is by continuing to do practice questions and simulation exams. I wish you all the best in your studies and I am sure that you will do great!
Regards,