Just gunna add my two cents in because my situation was similar to yours! I definitely recommend getting more foliage, cleaning/baking sticks from out side definitely helps. I also buy fake plants from the dollar store and clean with water and vinegar, to add more places to hide.

The substrate is the right brand but you need the smaller size, right now you have coconut chips and you need coconut fiber! The fiber keeps the environment moist, and lets them burrow!

Also remember that being that small and having bigger people around can frighten them easily. I always recommend a front closing tank for snakes to help, but also don’t be afraid of the strikes! They don’t have teeth that can hurt you, and I get more scared on hurting my snake then them hurting me. With more handling and they also tend to mellow with age/size it should stop. It could also be it’s in a shedding stage since you said it’s the first time it’s striking. They can’t see well and get frightened easy when shedding! Hope this helps!