''Albert,''
It has been about four years since your question was asked, so apologies for the delayed response. I’m new to ifixit, but a long time linux Fedora user.
Fedora is currently at version 34 which you should download if you’re interested in a supported version. You can download the iso image from here: https://getfedora.org/en/workstation/download/
This is a DVD file that can either be written to a RW dvd, or to a thumb drive. The idea is to copy to one of them and then boot your computer off it. Once you have it up and running, follow the instructions to do an install from the iso image.
Here is the installation guide: https://docs.fedoraproject.org/en-US/fedora/f34/install-guide/