Get motion of pictures

After you've arranged your still images in the Timeline, select an image and then go to the Effect Controls panel.  

Here you can create a keyframe animation for any of the Motion parameters.  You'll probably want to go with Scale and Position.  To push in on an image, create a 1st keyframe of 100% Scale and then a second keyframe later osf a higher Scale value later.  To pull out, start with the higher value Scale keyframe and end with 100% Scale.

If you want to focus on specific parts of an image it's probably worth working with Scale and Anchor Point rather than Scale and Position.  Although, for that type of animation it's usually helpful to have images that have an image size (for example, 3840-by-2160) that is at least double the frame size (like 1920-by-1080).

Once you've set up keyframes that you like you can quickly apply these to other images by using Copy and Paste Attributes, making adjustments as needed to each image.