You should hire a web designer to help you out a bit.

If you can't afford that, you could do the following small tweaks to make the site look better:

1. The main font color should be black or very dark gray, not this odd blueish green.
2. Get someone design you a logo. "MAJ" with the "A" awkwardly positioned does not look great. You can get a logo designed for you for a couple bucks at Fiverr or similar websites.
3. Use different color for the buttons. Now you have clickable elements (buttons) and non clickable elements (e.g. the top navigation bar) that look basically identical. This is bad for usability, when users need to be guessing what is clickable and what is not.
4. There is no need to have 10 CTA buttons in the front page. 1-3 CTA buttons would be enough.
5. Right now, the website as well as the UI of your web app is visually dull. An easy way to fix this would be to add some colorful icons. You can buy professional looking icons at 1-2 usd for one, or use some free icons collections.

There are also some bugs in the website. For example, there is no input validation in the signup form. One could even click the Create button without making any inputs at all.

Looking at the demo account, the web app itself looks pretty useful, if I'm being honest. If you invested into making the UI look really nice and fun to use, this could be a cool product!