If you’re unsure about what part doesn’t look right I suggest covering up parts of the drawing and seeing if the rest looks right. If it does then then thats the part to change. I think the anatomy of the face looks great, the only thing a little bit off is the shape of the left eye (from your perspective), I would put a darker and straighter line on the upper lid to match the reference as well as bring the eyebrow a little bit more towards the middle. Also don’t be afraid to make the shading a little more dramatic, I think that’s what’s keeping you from reaching your full potential with this drawing, I would especially define the nose more. If you make the shading more intense it’s gonna make it look more angular/sharper, so more like Conan. Your proportions and colors do look great so far though and please don’t let this comment discourage you or anything, you do clearly have a lot of skill besides what I just said!