Theme ( Showcase ) newbie startup

Hi im using the theme Showcase, my website is https://www.cjccreative.com , im a new startup designer. I hope someone can help me a little.

I havent added in anything yet, but i wanted to get all the nitty gritty out of the way first (if thats how it works), I want to have the site setup so its just like a normal website, no blog, no comments sections, just the home page with my recent work, then sections on Brand ID, Advertising etc

how would i go about starting with this?

Thanks, hope someone can help

Chris