One of the challenges about starting out as a writer is having your work accepted for publication.
Leaving aside the question of whether your story is compelling and well written, too often emerging writers do not think enough about the market for their work. I'm not suggesting that you constrain what you write. The genre, style, tone, theme, character and plot will depend on you and your experiences and imagination.
What matters is, having created something original, that you make informed decisions about where to send your work. An agent or publisher whose speciality is young adult fiction will not be interested in your post-Nordic crime thriller, while the crime fiction publisher won't consider your teen romance. Research those agents and publishers who handle your type of writing. Target these, keeping a keen eye on their submission guidelines and requirements.
Having your short stories published will give a fillip to your writerly credentials. Softcopy grew out of the ACT Writers Centre Hardcopy 2014 Professional Development Program and is designed for those writers starting their writing journey. If you have a short story of no more than 1000 words, Softcopy would love to hear from you.