Great stuff you obviously have skill. I especially like the Chimp. But I noticed something. When drawing a straight line does your hand wobble at all? Cause a stupid sounding trick I have done and it helps me draw a straight line is practicing connecting dots with a straight line. But before marking the paper do and imaginary line first. You can take that tip or leave it but I was taught this by a legit artist.
The only "disadvantage" with being left-handed is when you're writing words. Normally, when you write from the left to the right side, your hand drags across the paper making smears. So when I draw something, I start on the right side and make my way to the left. I'm also left-handed Good stuff here by the way. Keep us updated with any new additions