Don't feel bad for trying what so many would talk about but never do. I would agree that an automatic makes things a whole lot easier for new off-roaders as it is one less thing to worry about, when you have soo many other things to be considering.

The rock crawling on trails in AZ would be difficult for me to do in a manual. I like having the ability to break with one foot while controlling the throttle with the other.

Ian gave you some very good advice, go back out and try it again. You will notice large gains in your abilities each time you go out.

Have fun, and play safe.