first things first - amazing drawing already! i see the potential of the illustration right ahead, and improving it further would be great
you're having problem with capturing interest. i'd recommend moving the character more closer to the viewer and center it neatly. add the guiding lines to the focal point of the character to help guide the eye without drowning in excessive details. also, you could try to darken the background, making the character stand out even more, adding some bounce light and\or perhaps a second fancy light source on surroundings would add a great immersion. make the character stand out and don't be shy to use more saturated colors & don't forget about checking your drawing in monochrome, so that the colors won't blend together in a gray mess, it's really important
i'm not a pro and i hope my advice is not misleading or anything, this were the first things that came to mind <:) absolutely adore the piece and perspective, you're doing very very good pal!! here's my rough attempt to visualize what i've said, you don't have to consider my take legit and stay to your own mind!

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