Well I'm not what you call a good writer but I work at it everyday. I can't give you some great advise but I can share my experience so far. Who knows it might help or might not.
Biggest obstacles for me was learning what Show, don't tell means and finding a editor to help and making the characters stop going out of character.
If you want to do it then just do it.
No matter if anyone doesn't like it because at least, you know, that it came from the heart.
I did it and you can too.
Just be sure to read through your story once or twice to proofread because the people that read your stories can tell if you proofread or not.
I sometimes get too excited and release a story and may have skipped that step before. Learn from my mistake.
Focus on your strengths.
I'm not sure about this but I think my strength is action scenes where emotions are running wild. It is the parts, I'm most proud of.
If you at first you don't get feedback, keep trying and don't lose hope.
My first few months were an up hill battle but that is okay. It still isn't easy but it is a lot easier now.
Above all, have fun. Go nuts.