Here are a bunch of free videos for helping you out in Photoshop. Go through this course step by step. Note that it was not created by us. All credit goes to original owners.
The first tutorial for beginners.
Here is the second video specifically for YouTube Thumbnails.
The second part of beginner course.
Here is how to make a cool letter portrait…
Here is how to make a glass shatter effect tutorial….
Here is how to make a neon text effect tutorial..