It sounds like you have a very good plan. Unique content is the key to generating traffic. Using high paying keywords is usually a bad idea. Everyone else tries it, and you'll get crappy ads and low CTR/visitors. I would write about something that interests you, otherwise it will be hard to put a lot of work into your website. I've written a good article about making money with AdSense, check below for the link.
Earn money with Google AdSense -- This message may have been cut off and the rest will only be shown to members. To become a member, click here --