Install Linux on my dedicated server

I bought a dedicated server pre-loaded with CentOS and plesk panel 9. I have information about plesk panel and Secure Shell (SSH) root connected with my VPS. I asked my technician to install Linux and he installed Linux Fedora on my computer. I had a problem running it so now I need to install it by myself. But I don’t know how or where to start. Can anyone help? I know adding or removing anything from my dedicated server won’t cause any problem, right?
