Chair without color and monochrome versions.
Btw I figured that in op drawing the collar looks more like a bow tie, so I drew it instead.
Also you can remove signature if you want, I added it but honestly I don't like slapping it on something that doesn't belong to me and is a public property. It can be easily done in MS Paint.
Yes, I think it is. On my phone it was blurry but on computer it is better.
Looks fine, you don't have to worry. If you would've asked for advice, I would've said to make the upper eyelashes thicker, because in anime it is usually like that.