Just came across this great graphics resource called GraphicBurger. They have free designs and templates including mock-ups, UI kits, icons, text effects, backgrounds, …
find it at graphicburger.com
No clue how to make a design for WordPress, than why not get or buy a premade WordPress theme? Below you’ll find a list of great sites with a ton of WP themes.
Good look on your search for that fantastic WP design.