It's wonderful if you find that you have a gift for storytelling and for writing dialogue, but if you don't work hard to develop your skills, you may not be achieving the success that your talent could provide.
Why go it alone and only rely on your talent to get you somewhere? Why not seek out the advice and training of others who have gone before you and been successful in getting their screenplays made into films. You have a lot to learn from these success stories.
The kind of training that may be right for you may be university classes. The Independent offers a comprehensive list of schools with screenwriting programs. There are numerous seminars available as well. Robert McKee's Story Seminar is the most famous. Film Independent and the Sundance Institute offer very competitive screenwriting labs.
Another idea is to hire a screenwriting consultant. My brother, who is a screenwriter, decided he needed more guidance and put an ad on Craigslist offering $50/hour for a screenwriting consultant to help guide him through some revisions to one of his screenplays. He received a ton of response from screenwriting pros and found the experience worked great for him and the consultants (he ended up hiring two different consultants so he could get two perspectives on his work and loved the results).
If you have no money for training, perhaps a writing group would be a good solution for you. Being able to share your writing with others who can offer a critique of your work is invaluable. You may not agree with every note but, inevitably, you will find some thoughts that will truly enhance your story.
Or perhaps you want to find a screenwriting buddy with whom you can both bounce ideas off and offer critiques of one another's work. However you decide to do it, keep developing yourself as a writer just as you would your stories.