That’s pretty good, I especially like the face, it has a unique feel which I think matches the theme and designs of your characters.

Keep making it and playing around with different things until you’re happy.

What I’ve found helps when developing a style is to try and ask yourself what it is you want to accomplish, is it going to be cartoonish and iconic, is it going to be more humanoid, are the colours more or less exaggerated, think about what you want it to be and then use reference to help you get there.

Pinterest has a lot of great designs and useful techniques so I’d recommend getting ideas there. If you don’t know what style you’d go for then just use your interests as reference to that.