Yes, there is a learning curve. Perhaps VP has more "bells" than your earlier editor. Developers must be cautious so added features don't cause the program to become too complex for its targeted market.
Your effect is essentially picture-in-picture. But because it employs a transparent png for the higher track (the overlay), the lower track (the background) will show through in the transparent area.
Use a search engine for "Videopad picture-in-picture." Several tutorials and how-to texts will pop up.
As for positioning, select the png track and then click on VIDEO EFFECTS. Among the many choices is POSITION. Click on it. In the preview window, drag the png image to where you want it.
Setting KEYFRAMES (animating) is more complex, allowing infinite variations of position, scale, etc. as the timeline progresses.
These tutorials may help... http://www.nchsoftwa...tml?ref=nchblog
http://help.nchsoftw..._animating.html