Notice that the tab in the top left corner of the Timeline currently says "Timeline: (no sequences)." Until you create a sequence, you can't add anything to the timeline — so before we go any further, we'll need to create a sequence.
You can select a video clip that Premiere Pro can refer to when configuring the sequence, and Premiere Pro will use the clip to define the sequence's settings.
Step 1. To expand the Video bin, next to the Video bin's listing in the Project panel,
Step 2. To select a video clip to base our sequence off of,
Step 3. To create a new sequence, on the Menu bar,
Click File, Point New, Click Sequence from Clip
Step 4. To rename the sequence, in the Project panel,
Step 5. To rename the sequence, type:
Body/End Tab key
Step 6. To move the sequence into the Sequences bin, in the Project panel,
Press & Drag Body/End Sequence to the Sequences bin