Getting the ID for a specific twitter list that I want to appear on my site


I’m new to Ruby, and I’ve been looking all over the Twitter API site to try to figure out how to get the list ID for a specific user’s (my) twitter list. I found the thread “How do I get a list” but I don’t know enough to figure out how to take that information and make it useful. Am I typing GET into my command line or into my browser? Or where otherwise? I didn’t type in a callback URL when I created a Twitter Application, so would I be able to use the OAuth tool if that’s what I’m supposed to be doing?