Many great advices above.
Really ... writing an article can be a difficult ... and easy task, at the same time.;)
Difficult, because you...
may have a 'writers block' - you don't know what to write at all
don't know how to pass your message to the reader effectively
have an idea but you aren't able to write a compelling headline... etc.
Not everyone is born with writer's talent, but someone can become a writer with learning. It'll take some time and effort.
Solution may be the reading. If you are intent on becoming a writer, reading is one of the best things you can do. Make sure you are in an environment where you can think. Distractions result in taking 2 hours to write one sentence. Also keep a pen and paper near where you can jot down ideas.
You need to read anything that will get you thinking. Read a biography on your favorite authors. Their ideas on writing can inspire you. This is your research time. Without research you aren't able to write quality article. (The majority of my writing work consists of researching).
Watch what you read, how it is structured. Make notices. Your notice will be the ground of an outline of your new article.
Practice make masters. Write a lot. It can be as simple as a story about your favorite toy... or a film you saw yesterday... a poem about a dog... or something that you saw in the shop window this morning... or how your car got a blow-out. Write... as it comes into your mind. Write... as you talk with your friend.
You already have idea and know how to start. From now it usually comes naturally and your writing starts to flow. Understand the topic or situation to avoid useless and unnecessary writing. Think about how you are going to start and end, then decide what comes in the middle.
As you become more comfortable with writing you should try to write something creative for an hour everyday. Motivate and reward yourself with something if you are able to achieve your daily goal. Be excited. If you aren't happy about writing, then how are you ever going to do it well?:)
After a time you may recognize that there is a talent at hand and practice writing. Writing can be done at any time, can start as a hobby or interest that doesn't cost any money and can be made into a career if the talent and ability is there.
If you do not feel the writer's talent, after some practice, then you need to deal with something else. Get someone else to write for you. It may be better for everyone.
All the best,