You have very cute art and a neat style, I like it! <3 I'll give you some tips on drawing in order for you to improve, I hope it's okay with you because I always love to give advice to people!
- Follow anatomy. Take a wolf skeleton picture from google images and practice drawing around it to get the right shape of the wolf. Keep doing this for a week or two then see what magic you start to see when you draw without the pictures. You will see improvement because firstly, you are getting used to drawing with the mouse and secondly, you will revise the shape it has. You can also do this for the lion if you wish. :3 Do this for approximately 1 hour and 30 minutes everyday.
- Change the position of the wolves/lions face in every drawing. If you just draw the muzzle going to the left, you will never improve. So draw it facing the air, ground, right-up, left down, etc.
I hope I gave you some useful tips! and enjoy drawing along! <3