Yup, your landing page is very confusing. (mine once was too!) My best suggestion is to grab a few people who would be your typical audience, physically sit them next to them and watch/listen as you ask them things like:

What would you do first?

Is it clear what the site does for you?

What do you think will happen if you click X

Why would you come to this site?

Iterate and keep going! Good luck.