I have a question, how can I add an entire column with custom link to my forums?
I'm not an expert, depends of your theme.
As I would do :
1 ) Locate where is locate the code of your categories in you home.
2 ) Below add your code and play with the css
Think that most things you need to do, already exist in the theme, so you just need to see it in a different way, separate parts of any, and you find a lots solutions.
(Sorry for not using the technical words )