Looking for help in Art

No line between the left sleeve (from PoV) and the main body. Either that, or the length of the sleeve doesn't match up with the other sleeve.

There's a continuous line between the front pocket and the main body. That doesn't make sense to me.

Generally, the picture suffers from subtle splotchy coloring, sketchy lines, and bad proportioning.

My 2 cents.

Well I am a newbie when it comes to coloring.
And the continuous line is part of the design of the shirt; maybe I could have made it a bit more transparent.

Thank you for telling me these flaws.
I'll try my best to improve in it.