The main webpage is possibly too minimal. While minimalism is nice, as it sits currently, it gives the appearance of "not done yet". I would recommend adding more explanation about what a user would expect, maybe some screenshots, user reviews, etc.

It likely feels trivial as the creator but keep in mind that you know a lot more about your service (and your vision) than your users do. The goal of your landing page should be to bridge that gap. This all needs to be done without adding any extra work for your users (including filling out forms).

Hopefully that helps a bit?