Still having issues adding an arrow / + icon on nested header nav bar

I have been looking through the forums and attempting to find a solution, but cant figure out what I am doing wrong! I have added nested nav sections with a few options ach, but a) its not clear people should hover as there is no down arrow or other indication, and also I think the text layout itself isnt ideal.

The first issue is the biggest at this point so any help would be appreciated.Ive tried adding all sorts of custom css that ive read here such as:

* dropdown arrow */
a.Header-nav-folder-title:after {
    content: "\e009";
    font-family: 'Raleway.ttf';
}
.header-nav-item--folder:hover .header-nav-folder-title::after{
  transform:rotate(0deg)
};

And still no luck! Appreciate it 🙂

Hey, @ntaubman, drop me an email at abi@abibdevelopment.co.uk and I can take a closer look.