I think it looks promising. Like the comment above, a searchable drop down, where I can type in the partial name of the course and it shows all courses contain

I think it looks promising. Like the comment above, a searchable drop down, where I can type in the partial name of the course and it shows all courses containing that text, was the biggest factor in not singing up. Without it, you are asking your users to go to another site (perhaps after googling first), find a course, find the number, and then come back to your site. Another idea to add a veneer of legitimacy...at the bottom of the splash page, have a scrolling list of recent courses for which users signed up. If you are just getting started, create a list of 15 courses you THINK your likely visitor might be interested in (i.e., "fake it tell you make it").