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You're going to need to make the front page more attractive. This is not an area to advertise your website
If you give a demo on how it works and it gets the interest of people they will sign up. Also what else sets this site apart from others which is a benefit to them? I think you need a "sale page" that sells people to sign up. It can also include testimonials for satisfied users. For examples of sales letter see clickbank affliate web pages. Best of Luck!
I like a simple website but for your niche market you might need to make your homepage more attractive or more colors. Also, provide more information about the site, steps to sign up, video tutorials, where to contact support and etc.