Hi - Sorry that no one has responded to you yet, but let me try to get started.
Specifically, let amplify something I said at the end of my first post: There are so many wildly different effects present in the set of examples that you provided, you absolutely MUST break down what you are seeing into individual effects, work to develop your proficiency with each one, and then you can put them all together in one or more images. Trying to shortcut this process is like trying to run before you can walk, or trying to paint in color without being able to even draw with a pencil.
At the very start of my 1st post, I listed several efx that I saw in that image. Why don't you do the same sort of breakdown for one or two of the other images you posted, and describe what you think are the elemental effects contributing to the overall look. Then, we'll pick one of these and help you gain proficiency in it.
Another way to approach this is to have you post one of your attempts to reproduce one of the above images. We will then critique it and suggest which aspects could be improved.
Cheers,
Tom M