Premiere Elements is a video editing app with limited features. I do not believe it has tracking built in but there are limited effects available that may do the job. The learning curve is shorter than Affter Effects.
After Effects is a compositing and motion graphics app designed to create shots or short sequences. It can produce any visual effect you have ever seen in any movie when used in conjunction with appropriate 3D software. There are very few people that can use AE to create anything without a few hours of basic training.
If you want real easy there are some apps that will automatically track faces and add blur or distortion effects. Try google for those options.
thanks for the help