Project Scheduling

I am trying to do the most basic project management.

I have a project with several tasks, each have a duration and appropriate dependencies. Foundation>Framing>Drywall>.

In other project mgmt software i just need to set the start date of the first task and run the schedule and the gantt chart will be created based on the dependencies logic and duration.

So far i just have a mish-mash of tasks.

The whole idea of using a software like this is that during planning and delivery we can forecast completion based on actual data + estimated durations and dependencies.

what am I missing?