You can track projects in multiple ways. With GetOverview you can track:
ETA can be tracked from Overview screen, Project detail and Timeline screen. ETA is automatically calculated based on the tasks in that project, assignees and estimated hours of each task.
If a task does not have estimated hours and assigness, that task is not included in ETA calculation.
In order to track project if a project is on time, you will need to set Due dates to projects. ETA is compared against due dates to provide you insights on if projects are on time.
In order to understand which users are working on what projects, you can navigate to Overview dashboard and click on member names to see their ongoing projects. This includes the projects where they have some ongoing tasks.