Test Shirt for my K.K. Slider Build A Bear

So I recently got my hands on a KK Slider plush from Build-a-Bear, which is sick because now I can make my dream outfit for him that I've imagined in my head since I was a kid playing new leaf, irish jacksepticeye hat and a striped white and blue shirt. idk why but i always picture KK Slider wearing that combo. ESPECIALLY the hat.

I took my scrap white test fabric and tried to basically demo a good shirt size/shape, it went like just okay. My sewing machine kept unthreading (bc my awful setup rn) so I got frustrated and tried to handsew the sleeves. THAT also sucked so I just put it on him. The size was good but the construction and fabric was bad, which was completely expected.