You could use your preferred search engine: "download red hat" on google returns the answer in the first hit - same for "download linux mint" and "download ubuntu". My testing ended there, but I'm confident that "download [distro name here]" will return a download link on the first hit.
I mention Ubuntu and Mint because that's where you're going to end up anyway.
If I could echo user jefro's post on that thread:
However if one can't even find this on the web, the learning curve will be very high or long.