Writing is the thing that is not possible by most of the people. But if you work hard in that and have some clear vision you can succeed in that. First you need to decide how many hours you can spend in writing. This is really important because I guess you cannot spend lot of time in writing, because you are going to look after your father’s business.
Decide the number of hours in a day you can spend for writing. Writing in part time may need 3-4 hours per day. However you need to start writing for at least 1-2 hours per day. Taking a big step won’t produce good results to you always. You may dislike the writing career, if you are not able to cope up with the writing in the beginning.
Writing may not be interesting in the starting stages. All it needs the time you are going to spend the time for it. Search for many sites that teaches the writing so effectively. Consider this site , if you go through this site, you can get all the information about writing an essay, articles, blog post and so on. If you are beginner in writing, then this site will be very useful to you.
Then the other things that may useful in writing is the choosing your type of writing. You need to be very careful in choosing the correct writing style that suits your way of expressing. Writing is all about expressing yourself to others and giving the best information to the reader. There are various types of writing like articles, blog posts, essays, research papers, Google knoll, Wiki Writing, Press Releases and Many more. Many people prefer to article and those who have sites will prefer to write blog posts. As you are doing it for a part time I would suggest you to go article writing.