Boost Sales for Online Course

I'm looking for a sales expert to help increase sales on my online course website, learncubingonline.in. The site currently features a single course: "The Ultimate Rubik's Cube Mastery Course."

Skills and Experience:
- Proven track record in increasing online sales
- Expertise in social media marketing and paid advertising
- Experience in developing effective marketing strategies
- Knowledge of SEO to improve site visibility

Please provide a detailed plan on how you intend to boost sales, along with any relevant past success stories.