Fairly new to GFX, Crits pls?

[Sage_Shadowbane]

Hello everyone, my name is Sage...some of you may know me, some of you may not. I am fairly new to graphic design and have recently developed a passion for it. I just finished this image about 5 minutes ago, it took me about 20 minutes to make. Can I please have some constructive criticism on how to improve the image and further improve my skills? Mind you that the lineart and shading were both done in MsPaints. Thanks