Nice clean looking site. I like the colors and the content is well organized.
A couple of suggestions.
Your top carousel images should all be the same size. I one that is larger causes the page to jump around a little because it’s bigger. Maybe even look at removing the padding and making the carousel edge to edge.
With the three main columns with images, two of them have a color cast in the background that is not solid white. The would look much better if they were white.
You need to do a little work on the smaller breakpoints. On mobile, each main column needs to be 12 wide to fill the screen. It currently looks to be only six.
I would also change the Hamburg menu icon to light. A dark icon on dark blue is harder to see.
The p text on the smallest breakpoint is a little hard to read (for me). Maybe add just one point or even try adding a little more line-height, sometimes this can really make a difference in readability.
@Malachiman gave you some nice advice with the help links, and I feel Eldars tutorials are essential if you really want to learn how to get the most out of Blocs.
I want to stress that overall you did a really nice job. I wish my first effort was a good as this one.