Congrats! Yes, pictures. And yeah, trails are an awesome way to get to know your own bike without the worry and stress of traffic. They are a great way to interval train, too. Which 16 miles RT is pretty perfect for!

Another great way to learn traffic skills is to go and ride with a slower non-competitive group of people to help "socialize". If you let them know that you are new to riding and are okay with new riders (some groups will say they are non-competitive and then expect you to have ridden in groups forever, it's weird), they will definitely make you feel more confident about traffic. I've been a road rider for most of my childhood and adult life but riding with more experienced road riders really helped me plan safe routes and made me feel more confident. Joining a club is invaluable, IMO. You just have to find on that works. Not all are created equal but once you've found a group that works, it's awesome