Tick the little box to the left. You may have to specify where you want it to output to as well. Those tutorials should have gone over that.
You see where it says, "Not Yet Specified"? You haven't told AE where you want your rendered file should go. Click on that message, navigate to a place where you want to put it.... and because there are two items in the AE Render Queue, you have to do it again for the second item. Then you can render.
You only have to do that navigation once if you add just one item to the render queue. Any subsequent items added to the queue will automatically go to the same place.
Thank you! That makes sense why it wasn't doing anything, all sorted now.