You've got the start of something good here, but it isn't fully realized and needs a lot of tightening up. To start off with, the full canvas size is impractically large, shrink it down to something less massive, 25% of its current size is plenty big enough to get all of the details at full size, but that's just for viewing convenience. Compositionally speaking I'd say this works alright; the panel construction is solid and the big to small "zooming" in of the character creates enough interest for a page especially if its leading to a reveal of sorts on the next page. Where this falls apart though is in the shading and color choice.
As it is right now everything is too blurry, the method you used for shading makes everything look out of focus and unfinished. There isn't enough contrast and your value range isn't big enough to grab interest. Your character gets a bit lost in the background, there are a few ways to fix this, but the most direct way is going for harder shading, not being afraid of making hard lines in your shading, comics (for the most part) live and die by strong contrast to create drama. The lack of contrast paired with he messiness of your linework create a very out of focus and unfinished look for this. The sketchy look can be done well but you're going to need to use a hard brush for that - in fact, I would suggest going with anti aliasing turned off to create a very cool pixel look that might suit your work well. Also that border isn't working, it could work, but its too similar to the panels and the bright violet eyes on the skulls pull attention away from the panels. Doing border art for comics is a slippery slope of making the border art itself look interesting while not only not distracting from, but enhancing the panel layout and action in the panels. I would recommend doing studies and figuring it out more before implementing it yourself, because when it doesn't work I find that it takes a lot more away than is worth it.
Clarity and drama are what you should be aiming for above all else with comic making, and the best place to start with both of those is bold solid shading and characters.
Hope this all helped, good luck going forward.