OK, I'm pretty new at this too, but I'll give it a go.
1) To start with a simple zoom, double click, or click Modify.
2) At the top left of the pop up window find the thing that looks like a mouse with a tail, something that means movement, click it.
3) Click the green X, that means that you are going to determine the path of the movement.
4) Now locate the blue scrubber, moves along the timeline for this object/clip. Click on it and move it back and forth, this shows you what it will do, like a preview.
5) The orange diamonds at each end are your keyframes, basically points on the timeline that determines where whatever changes you make, are going to happen. Right now you only have one at each end, start and finish.
6) For a simple zoom, move the blue scrubber to the right, end. Now locate the white dot at the bottom center of the image. Slowly pull that a bit and your image will get larger, zoom in.
7) Now move your scrubber back and forth to preview how it will zoom.
If you need it to zoom a bit to one side, place your cursor over the square in the middle and click to position this, at the place in the timeline that you want this to happen. Remember that if you want this position to be the end of the zoom, you MUST do this when the scrubber is at the end.
9) You can click the play button on the preview window to watch it happen. If it looks good then click Save.
If you want to make adjustments later just open the Modify window and remember to have the scrubber where you want it to happen.
Advanced keyframes requires adding new keyframes along the timeline to have the image move to and from and resize and zoom. It gets a bit complicated when you add move keyframe points, but if all you want is a simple zoom, that is easy to do.
Hope this helps get you started.
Cheers
Richard
PD10, build 10.0.1129b SR VDE111213-07
Windows 7, 64-bit, Intel Quad core 3.3 GHz, 4 GB RAM, Intel on board graphics display (shares the RAM), 931 GB free space