Finally finished, about 9 hours of work spread out over the course of the week. I didn't add details that people who are actually good at this type of work would add, but for my first finished image, i'm extremely happy with it. Will try to upload more of these as I make them, following the same style/techniques that I have learned from Jonas De Ro's DigitalTutors learning guide.
My ultimate goal in this is to just be able to make whatever I have in my imagination, i've got the feeling that creating my own work from now on is going to be getting worse before it starts to get better, but it'll be worth it.