How to move files with a specific file extension from within a parent folder as well as its' subfolders to a new folder

I want to move all files with extensions such as: .JPEG .MP3 .MP4 .MOV .AVI .PDF .PSD .WAV .TXT

...to new parent folders named after the extension of the files contained therein. Currently I have too many files within so many subfolders (under one parent folder) to do this manually. I tried searching the parent folder with * to then sort by file type but it is too much and my system either freezes or is unusable/slow. please assume I know nothing in regard to scripts/batch files but I can follow directions, copy and paste ;) please advise.