No reference - practise

As the title says this is simple practice of drawing without references, it took me about 3 hours. The school is literally killing me, taking me to the extreme, so I'm too late with commissions and I'm not very active in DARPG. As for this dog is a random subject, I do not know whether to keep it or give it away for auction, if anyone is interested I could think about it. Yet unfortunately I can not respond to feedback and notes since I have to go right back to the study. This drawing has allowed me to relax a little and as soon as I finish design commissions and I have less weight by the schoo I'll make available commissions like this.