You should have received a link to your VPS Control Panel when you signed up for service. The very first thing you need to do is go to your VPS Control Panel and then select and setup your operating system. Your VPS is little more than a blank slice of disc space until you complete that step. I would suggest using Centos for your operating system, but that is up to you.
If the terms we are using are unfamiliar to you, then you need to immediately do some studying as I suggested in my previous post. You must have a basic understanding of L.A.M.P., SSH, and Command line before you are going to be able to do anything with your VPS.
We will be very happy to assist you with your VPS as much as possible in this forum, but it appears that you are going to have to do a little reading and familiarize yourself with how an unmanaged VPS works as well as some of the common terms related to VPS service.