What a delightful design!
The big thing that jumps out to me is that this seems more like a homepage for a website and not a landing page. Landing pages are designed to narrow in focus on your promotion (in your case your free trial) - and of course to get users to convert. Your website looks great - however consider creating dedicated landing pages for your campaigns! You can still keep what you have, but what about creating trial.gethighlights.co?
There you can create a message match that is solely focuses on your free trial. That would mean you have only the information which is most crucial for a user to read to convert - a lot of what you have on your home page, but without the links at the top. Those links can be distracting for users and they can get lost before converting! Here are some examples:
The pricing page - if a user has click on your free trial campaign (assuming that is what it is) - they do not want to deal with prices at that moment. The prices could scare them away. I would remove from the landing page.
The login page - some users click on this out of curiosity - from that page , new users have a low chance of converting (right now there is no ‘Free Trial’ stated). I would remove from the landing page.
The blog - sure there is a CTA at the top of the page and you have a popup, but this is an easy place for new users to get lost. I would remove from the landing page.
What about using an additional color in your palette - maybe that green that is showcased on your product? It would be a great contrast color for the CTA buttons so that they stand out more that the rest of the content!
Add some additional CTAs throughout the pages
What is “the next level”? Instead of just explaining this, tell them what is a great thing that will come from using Highlights!
Lastly, did you test all of your re-launches against the previous one? Do you have other tests running currently? I personally get a little scared with making several major changes at once without testing!
I am happy to help in any way I can!