I suggest you start blogging.
Blogging is an online media which is basically a journal or a diary. The distinct feature of a blog is that it indicates the date it was written. Blogging was originally for diary writing but it grew into a marketing tool where bloggers have become one of the marketers by giving a review on certain products, movies, restaurant, a vacation destination, and others.
When you blog you are actually sharing your work to the whole world if you allow the public to view it. You can use a blog as an outlet for your deep emotions as what I did when I started blogging way back 2005. Blogging can be a practice ground for your dream career of becoming an author. Blogging now is not limited to the "diary" or "journal type" format. You can blog about your passion for photography describing each day the basics of photography, telling your reader how to use different lenses, how to make well use of natural sunlight for lighting and others. You could also write your childhood fantasy story by telling a different part of the story each day thus creating a series or chapter by chapter effect. You can hone your writing skill through blogging.
Also many bloggers have taken their online work to the actual book format by either compiling their best post or by making a detailed book about what they have been writing in their blogs. In a way blogging has become a launch pad for their writing career.
There are two major blog format in use: Blogger and Wordpress.
As you can see I use Blogger.
Wordpress on the other hand has some great following specially on those who are great at coding and web design. But in order to do such one has to upgrade to a paid version. Also only paid versions can put ads on their blog. Customization is a Wordpress advantage over Blogger and thus many prefer to use Wordpress.
There are other blogging formats like Tumblr, Posterous, and others thus you can choose from these formats to start practicing your writing skills. As they say "Practice makes perfect."