Continue to blogging or not.:
You don't know that you will continue to blogging or not . If you chose blogging as half time or full time job you should move to a self hosted blog, but if you are not sure don't take any stupid steps like Registering domains , buying webspace or etc. you should have a experience of blogging.
Blogs are easy to create:
You don't need expensive or complicated web editors or web design software to create a blog. Blog vendors offer you a variety of templates you can choose from. Most likely you will find among them one that offers the look and feel you're looking for. Your only web design expense may very well be to pay a graphics artist to design an attractive logo that makes your site unique.
Blogs are easy to maintain:
Blog software allows you to post online, which means that you won't need to bother with FTP software. This also means that you can post anywhere, not just from your own computer. You may be in a hotel room in China, and if it has an internet connection you can log in and update your website from your web-based control panel. Your blog's software will automatically move your most recent post to the top, while archiving older posts by date or by topic, so you don't ever have to bother to move web pages around.
Blogs are search-engine-friendly:
Since blogs assign each post an individual URL address, each of them will have it's own, separate web page. If you take care of making each post very focused on a specific topic and carefully choose the keywords that best describe your post (using them in the post title and post body), they will stand a very good chance of ranking well with the search engines. Also, since blogs tend to be updated regularly, search engines will crawl them often (search engines love fresh content), adding your new posts to their index.
Many great blog hosts are free:
There are several excellent services that offer blog hosting for free. The most well known of them is Blogger, a free blog service owned by Google. Signing up takes minutes, it offers many different templates and customization options, and also gives you the option of tying your blog with your Google Adsense account. That way, not only is the service free, but you can also make money. The downside to all these great advantages is that they have encouraged the creation of a huge number of me-too and low quality blogs that don't add value and hardly get any traffic. Don't fall into that trap. Before jumping to create a blog, remember that to be successful you must write about a focused and original topic, or offer a unique perspective on a common theme. In the end, as the cliché says, it all boils down to quality content.