Very nice, if I may offer some advice, a fun exercise I used to do that might be helpful at this point in your journey, texture balls!!

If you can isolate textures and apply them anywhere you can really put your art to the next level, a strong metallic texture on the beak, for instance, would have a strong, simple, contrast, drawing the eye to that point and letting the feathery breast and scale like bird skin really pop

Also I just think they're neat

You have the common outline everything problem. That works for really basic comics and stick figures. You can even elevate it like manga and other graphic novels. But that stroke layer is often just that. You really need to focus on what your tool is and the render intent.

The beak looks really weird.. So do the eyes.

Sadly, your not even keeping the grain of the feathers.

Focus on the brightness and contrast. Don't outline. Your using a multiplicative medium. Draw the shadows. Sometimes instead of gradients you can use strokes.

Or you could use an additive (digital) medium.

If you have light colored pens that can brighten, then you can maybe use that for highlights. Otherwise you need to let the paper shine through.

Like the feet are another area where you're outlining instead of 'painting the darkness'. Realize traditional media is subtractive. Things just get darker and darker and it's often hard to remove than do less. So feel the darkness if you're doing art this way. Blend those shadows into the canvas. Playfully, lightly if you want realism. Still focus on those dark areas. Illuminate the highlights by the abscence of pigment.

Keep improving. Practice is everything. Nobody is born knowing artistic techniques.

When talking about the eye you need to actually know what you're suggesting an improvement to:

The Composition Stage - and "the gesture" of your drawing.

Part of a stumbling block for drawing at the level we're on (yes I'm stuck here to) - is we're still not spending any effort on penciling in the gesture, the perspective, the composition - THEN drawing over it.

You and I are still "drawing to copy" and producing scratchy art by duplication of what we see, rather than working on gesture and composition to convey something.

P.S If you ever want to do digital art, can recommend a cheap passive capacity stylus (under $10 on Aliexpress, works on all mobile digital devices) and infinite painter or krita which are free.