This is a very simple question to answer. First off, lets compare the platforms.
- Owned by Google (SEO +)
- Templates only not much custom code (Webmaster -)
- Very limited monetization (Money -)
- Multiple plugins to help manage SEO (SEO +)
- Templates and custom code (webmaster +)
- Unlimited monetization if you own domain and Hosting package (Money +)
After looking at the comparison, it is easy to see that Wrodpress is your best bet!!! Also, you want to purchase a domain and hosting package. Host gator is cheap and great! Having this will allow you to do whatever you want with your blog and not have to follow strict conforming guidelines. Once you have your blog, you will want to learn how to optimize it for search engines. I teach this for free at Wealth Creations Network. Every thing is free. You should check it out.