I also am a newbie, in fact, I finally picked up my new knitting needles today to try to see if I could do it! LOL!
I was going to post the video here, but it says I have to post 2 posts first...so I will post this and a blank one, and then try to post the video that I used!
and was able to get the hang of casting on very quickly. I even was able to do the next few rows...the only problem I had was they slipped off the needle from time to time and since I didn't know how to fix it, I had to start all over!
But watch that video and see if it helps you! Good luck!