Idea concept build _ Sketch a concept, insert clip art or pictures, and use SmartArt to create a foundational visual... the base visual that you will build upon. Then add additional graphic components directly over the foundational visual. Alternatively you can create consecutive slides where you build increased complexity from the foundational slide so that you show how an idea concept develops and progresses layer_by_layer.
Creating your own word press template is a difficult job especially if you are still a beginner. Luckily, there are tons of ready_made WordPress templates available in the internet. You can download and save them for your internet projects. Nevertheless you must learn and master the skills of creating your own WordPress templates. Why hire a web designer for your page if you can do it all by yourself?