Blogging is about writing. If you don't like to write, you probably won't enjoy blogging. But if you've never tried writing, you may have an as yet undiscovered talent that you would enjoy. So try writing a few practice blog posts. Write about something interesting to you. If you enjoy writing, then blogging may be for you!
Make sure that you do not have duplicate content. You can check for this by using the robots that are out there. If you do have content that is duplicated, the search engines will probably tag your site for spam, and you will not wind up getting the attention that you are looking for.
Avoid writing blogs about subjects you have no interest in or know nothing about. It will reflect in your writing and you could possibly come across as uninformed in you are unsure of what you are writing about. This can turn readers off and they will avoid revisiting your site.
Make a posting routine. This requires lots of self-discipline, but it's essential to your blog. If it's not updated constantly, then there's no blog. Try experimenting until you find one that fits your pace. There are some bloggers that post around 2-3 articles each day, while others post about one each week.
Building an online presence via blogging is something that takes time, keep this in mind. Just remember that the sooner you start the sooner your potential to build an audience becomes. So do your best to apply all of the knowledge you learned and the audience you've been seeking should follow.