I downloaded the program but have absolutely no idea how to use it. If anybody knows of any tutorials I can use, or has any tips for me, I would greatly appreaciate it.
http://richdiesal.jedioutcastmaps.com/tutorials/index.html go here it is good
you should use gtkradiant though, not jk2radiant. mostly noobs use jk2radiant. www.qeradiant.com