This is my first piece of advice, along with write every day and twice as much on Sunday. Get used to writing finished pieces, play with styles, subjects, play with first and third person, with restricted views and omniscience. Also, fifty or so short stories gets the plain vanilla out of the way, the less special, the stuff haunted by your own roots, your problems, zits, first love, first infidelities, and ambitions dashed. You will have produced three or four anthologies, produced fifty kernels, maybe fifty saleable plots for movies. That knowledge is extremely useful.
Simplicity can be more telling than grandiose language.
Be aware that you are probably pretentious, that you want people to think you're bright, erudite, and more worthy. Avoid trying to prove it. Instead, tell your stories simply, stories that people will love, and maybe then they'll love you. READ, READ, READ, READ, READ Never stop reading. Look at the pompous, the Booker winners, the National Book Awards, Pulitzers, Nobel Prize winners, and look at the bestsellers, look at the greats and classics, and don't be afraid to read junk.