Is this tucked shirt w/ chinos good fit?

I'm not sure what I'm doing wrong but when I tuck in this shirt with these pants, I dislike my silhouette.

I don't usually tuck anything in so it might be my head but I want to get other's opinions. Idk it feels like my thighs and lower body just looks too big proportionally after tucking in. I'm a shorter guy (5'6") so I thought tucking would give me a better proportionate fit but it doesn't feel like it.

The last pic I included shows me with it untucked which I think looks pretty notmal/decent.

I'm very new to this still so please go easy on me, just want actionable advice.
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