Hey , your work seems to have great potential , i love the powerful tones in it.
My advice would be not to use so much liquify and filters. I suggest you work on your own skills and not trying to use the magic buttons of photoshop. Draw as if you are drawing on papper , with the exception of using layers ofcourse. This is the best way to learn as you develop your skill without being bound to a programm to draw for you. Furthermore , once you attain enough experience , you will know how and when to use said magic buttons appropriately.
In addition i suggest you study life and speed painting videos as much as you can. For example , if you wish to draw a dragon , a good idea is to study pictures of lizards and other well drawn dragons. This way you can understand the biostructure of your character , its anatomy and how it works. Once you understand the anatomy of a life form , you can do miracles with it. Think of it this way. When you draw something , no matter what it is , even the most fictional life form , you are putting a puzzle together. The pieces of the puzzle are the different body parts , muscles and so on , all the things that make an object alive. To make something believable , there must be enough puzzle pieces for the eye to see and understand.
Furthermore , i think you can work more on your background. Define the landscape more , give it a solid shape.
Hope i helped , if you need any firther info ask me.