Becoming an accomplished creative writer is not so difficult as many make it out to be. All you must do is just start writing!
The physical location is important only to you according to your preferences and creative process. Pick the many places that work for you.
Any accomplished creative writer also enjoys reading stories by other creative authors. You will read their stories and develop a trained eye to identify literary devices and techniques that they use. For example, you will identify alliteration, hyperbole, and point of view. You will identify, theme, symbolism, and foreshadowing among many others.
Try the creative writing that you are weakest at in order to strengthen this. For example, I struggled with poetry in the past. Therefore, I chose to read more poetry, to study more poetry, and to ultimately write more poetry.
Also, search for a writer’s community or club that supports your hobby of creative writing. Ask your peers to review your writings so as to gain ideas to make it better and to gain a new perspective.
To be a creative writer you must just start writing!