Once again a fun challenge. I liked that you talked about reference, I am working on getting better at using it and not basically copying it. I found grabbing tons of images and then putting them in pureref helped I just looked away from my monitor and started drawing after seeing a bunch.
Here are the 10 with one drawn over:
Sorry if they are too light too see, I just need to buy a scanner I swear. But I mean that kinda is the purpose right? To get some guidelines down.