I like it, the colours give it this sort of retro-ish feel, which is always nice to see; if you wanted some improvements, look at pose references, you could use google images for this as that’s what I tend to do, it’s a good reference point.
another point of criticism I would like to add in is that in order for this to stand out more, think of your composition, rule of thirds so to speak, whilst there’s contrast in this image, adding elements that make your focal point (in this case, the avatar) pop out more.
Also try to experiment with different camera angles, as that can also give drastic change to your artwork