Thank you very much!
Imagining the lines in my head is difficult, I remember trying it when I began to draw and not really seeing how I could do it — but it's been a while, so I'll try again next time.
I like to shade and add minimal background when I can, I was planning to shade the longer poses here but I think I spent too much time correcting the lines.
Thanks for the point about straight lines; at first I was drawing too many of them so I'm probably overcorrecting now!