I did this little piece a few weeks back for Colour Collective's "Sweet Potato" prompt. I decided I'd have fun playing with a limited colour palette, since it was such a retro orange. It reminded me of the reading books my mother (a teacher) has from the 70s - black and white with one spot colour at different strengths. I am so glad we no longer have to separate colours for colour printing now!
Here's a look at my screen while I was in the sketching phase. As you can see, I had a reference that I'd picked up in a google search, but I was only using it very vaguely, really more as a way to get the balance of the figure right. When you're drawing a figure it helps to have some sort of reference to hand, just so you remember your proportions. (Yes, at some point after I took this screenshot I decided her legs were too lanky)
Adobe Photoshop CC 2016 on a Wacom Cintiq Companion 2. Not entirely sure how long it took me because I'm very late writing this post and I've forgotten, but it was a couple of hours.