Hi Drummercook and welcome!
You got a bargain. I have a Ronco dehydrator, too, and really like it. Yes, you can make your jerkey the way you're describing. But let me give you a pointer on slicing the meat. It should be sliced very thin. To do that, put the meat in the freezer for a while - just until it begins to firm up. Then it will be easy to slice it very, very thin with a sharp knife.
Herbs are great dried in the dehydrator. I've dried my own green peppers to make green pepper flakes/chunks. They're good, too. I think the herbs taste better because they're fresher to begin with.
One of my favorite uses is to dry bread cubes for stuffing. I use the least expensive sliced loaf bread I can find. I freeze the loaf overnight and then slice it (4 slices at a time) into large cubes while it's still frozen. It will shrink quite a bit during the drying process. One 24-ounce loaf of bread will usually fill all 5 of my drying trays. I rotate the trays at least once during drying. In about 2 hours I have perfectly dried bread cubes.
I also use this same method to make croutons out of whatever bread I want to use for that purpose.
If there was no instruction book with the dehydrator, email me and I can send you a pdf copy of mine.
"As a girl I had zero interest in the stove." - Julia Child
This is real inspiration. Look what Julia became!