Is this theme in portfolio style, can I set up a membership site with it that delivers online courses and accepts payments. also are there walk through videos for installing this theme because I don't understand css or even html that much.
Creating a website using WordPress CMS isn't so hard but it requires at least basic knowledge of its features and functionality. There are not any payment systems that come along with the theme.
The theme comes with the documentation that pretty clearly describes the theme installation process and also how to organize it.