Your bird looks great, nice first smoke.
Here's a few tips to get the skin crispier. I see that you spatched your bird so stick with that. It helps cook the bird evenly and also helps get the skin to crisp
1. If you can run your pit at 325°-350°.
2.Air dry the bird. Best to do this for 8-12 hours uncovered in the fridge suspended on a drying rack over a container to catch drippings. Now if you don't have time to do this you can use a hair dryer on low right before putting the bird on the smoker.
3. Prior to air drying the bird season it with Salt and baking powder. For a 4-5 pound bird use 2 tablespoons of salt ans 1 teaspoon of baking powder. Rub into the skin. This is called dry brining.
I usually will also add cracked black pepper, garlic powder, onion powder and sometimes chipotle powder at this stage.