redirect WordPress.com to .org

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as a beginner to wordpress, I made a wordpress.com account for a blog I want to start up. I named this blog Purple Teeth Club and purchased the offering of buying http://www.purpleteethclub.com. After playing around with my wordpress.com site, I decided I wanted to teach myself ww.wp.xz.cn because it seemed to offer more of what I was looking for. Unfortunately, I am a bit of a tech noob when it comes to stuff like this. I am determined to teach myself still, and to not give up but now I am stuck. I want to combine the two accounts and use the domain http://www.purpleteethclub.com for my ww.wp.xz.cn account but I have no clue how to do so. I have been researching for two days with no avail. Can anybody help me? Thank you!