First time crock pot cooking, and I'm a little nervous?

It's embarring to say because I'm not a young woman, but I've never cooked with a crock pot before. I'm using one my hubby had so I don't have the manual anymore. I'm doing pot roast, so I browned it like the recipe said, put in the gravy ingredients and some veggies, and then I turned it to "Low" and covered it with the plastic lid. I'll be at work so it will be cooking for about 8 hours or so. Did I do that right? I feel so silly for being nervous, but I'm domestically challenged and I've had a few stupid kitchen accidents...don't want to light the house on fire! ha ha