If you are fresh with WordPress then you need to understand WordPress ecosystem a bit before you start using a theme. There are many great tutorials on the subject.
You can start here http://www.creativebloq.com/web-design/wordpress-tutorials-designers-1012990.
Also, read tutorials written by the First Site Guide team on https://firstsiteguide.com/guides/. It is very well written and informative website on subject of blogging and setting up your own WordPress site.
We hope this will help you!
We can’t explain everything about basic WordPress usage, but we will help you as we can, and direct you to right places. If you have any questions come to our support forum.