SEO/Social Bookmarking for iPhone App

My main aim is to be on the first page of Google Results for given keywords. For this, I am looking for help from an EXPERT SEO specialist that can help me achieve this within a reasonable time frame. Currently I have a website, and a YouTube video for an iPhone game that I developed, and I need only quality visitors who are likely to purchase the product. Please let me know what you can do for me to achieve this, and how long will it take to see the result. Thanks