It's pretty simple, you just need a blackberry\iphone and a PC\Mac to get things going.
The hard part is being able to create content within your blog that people will actually be interested in reading. But if you have a passion, then I'm sure you will have readers. "If you build, they will come" - Shoeless Joe in Field of Dreams
The 2 key tools you will use are;
1. Your blog - which you will use to create articles about your interests. Your blog can then be syndicated to your website(s), myspace, and facebook via RSS.
2. Your Twitter account - which will help you build a network of followers and also keep in touch with your fans\followers. Your tweets (status updates) can then be syndicated to myspace\facebook via myspace\facebook apps and of course many of social networks in the near future.