Complete Newbie with a question about Keyframes

Hello everyone,

I am starting a YT channel and preparing a video for it, my first.

I wish to create the effect of an image (still or video) emerging from a background to the foreground. I think this is called a keyframe zoom in effect but am uncertain if that is correct or where to find a Dummies’ guide ‘How-To’ guide.

Any assistance would be greatly appreciated.

Happy New Year everyone