Change color in links / menu / etc.

Hi. I find it difficult to find where i can change the colors in the theme.

1. Categories -> Changed font color to black. On hover its yellow. I want it to be black.
2. The icons in front of the link -> where can these be deleted
3. Font color in menu is white -> where to change it to black?
4. Icons in front of the menu links -> where to change or delete?
5. Where to change color font on show or hover.

I can find some in documentation but it seems that im changing the wrong things. And then the learning curve is a bit steep to find where to change this settings.

Thanks in advance all.

G.