I know the difference between a post and a page. I previously read through all your links but didn't find them helpful thus why i asked for help. (I'm a bit thick).
Step 1. I created another page that isn't the Home page called Fashion
Step 2. I created a sub page called trends
Step 3. Created a custom menu with page fashion + page style
Step 4. Added my existing category called fashion to the menu.
Step 5. Saved created menu.
But I still have a blank page when i click on my Fashion page and my style page (no posts from the category fashion).
Where did I miss a step?