Introduction! Very nice job! The expressions and eyes of the characters look very nice! You seem to have a good handle on hands, too!
The hair/fur, though, could use a little work. You've already simplified it, by drawing clumps, but the scribbles to represent depth aren't needed, as you seem to be going for a cartoony style. The highlights are a little strange too, but your knowledge of light sources will grow! Try drawing some still life to get some knowledge of light sources (or just draw where you want to source to come from and think about if it's harsh or light) I know it helped me a fair bit.
I really do like the characters shown! They don't have too many colors on them and are simple, which can benefit you a whole lot while drawing them.
Overall, this is a good piece! Though some things do need ironing out, they're really simple fixes! Your art looks really good, and you should keep drawing!
