I think the easy solution here would be to adjust your wording a little on the landing page to tell me I'm signing up to hear more information and be informed when it launches - not that I'm signing up to "get started". You have saved my email I gave you so you can keep me updated right? That's not clear in your text either but you really should be doing it and letting people know that you are.

In terms of feedback, well I tried to sign up so I guess that tells you I liked it a lot, can you elaborate on how far along it actually is? Are the various screenshots current development status or are they just mockups at the moment? Your blog only has one post and it just shows a photo of a laptop on this landing page. I'm not a big fan of the tagline, it seems really convoluted - reusable checklists for teams is much closer to what it should be I think. Also I spotted a small typo, "Create beautiful and simple checklists that is easy to maintain and...", is should be are. :)

You should put a sign up button under each of the package options too, and use your analytics to see where people sign up. But really, most importantly, your website tells me your product is ready to get started with, I tried and now I don't know where in the process of being built it is. I really suggest clearing it up. :)