Please take the time to check out the excellent services provided by the sites below, both have been a great inspiration to me and helped me greatly on my learning journey.
Phlearn is a small company and what I consider to be the internet's best place for Photoshop Tutorials. They regularly create tutorials which are publishedon their YouTube channel. They also have some excellent training packages from beginner to advanced, aimed at helping you to master Photoshop.
Serge Ramelli is a French photographer living in Paris. He creates one to two free tutorials per week which he publishes on his YouTube channel. He also has some excellent training packages on his website covering all aspects of photography and retouching in Photoshop and Lightroom.