Okay.
- You have a really good notion of colors already, and that is an excellent thing, the way you painted some of your peacock stuff is really impressive for me.
- Your pixel art is something very good too, it seems that you can make some really cool looking sprites.
Now, some stuff before i go into criticism.
-As said before, MS paint is not a very reliable software, even for pixel art i think you can find better tools (i don't know which, i'm sorry).
-GIMP is a great software, and it is complete, i've found some great artists and they use GIMP to do their paintings, etc...
-If you feel like trying, as Photoshop, Paint Tool SAI or Manga Studio (Clip Studio Paint Pro), are great tools for digital painting.
-One thing, it seems that you are still using a mouse, if you have conditions(money), i recommend you getting a tablet, even a cheap one, it will make a difference.
Now, criticism.
-I can't give you advice in your colors, while there is room for improvement, i can't tell what it is, and i think it is something you'll improve naturally, but since you are using pencils, i think, you should be more patient, and fill more the spaces, so it doesn't look, rough i would say?
-Now, your drawing on the other hand needs some heavy work, they look stiff, and your drawings are not consistent, the advice that i can give you, is learning the fundamentals in general, even if you have a very distinct style, learning stuff like gestures, anatomy, proportions is really important, i'm still struggling with them.
Don't be afraid of looking up tutorials, and if someone says something harsh to you, try to take the good thing out of it.
And my last advice, is keep doing what you like.