Move from Slackware to RedHat

[Daryoush]

Hi pals
I received a lot of recommendations to switch to RedHat. I took a look
to sunsite.unc.edu:/pub/Linux/distributions/redhat. Since I'm pre-new in
RedHat, I don't know whare to begin. I know that I have to take a read
HOWTOs but I don't know which one. Socondly, what are the files with the
.rpm extension?

I have lots of questions. Is anybody ready to help me to the end of
downloading and install?

daryoush