/ic/ - Artwork/Critique

Not so fast!

Mimicking a style is more than doing copies, you have to understand it from different angles.

Pic related is also by tkmiz. Way cleaner and tight.
He has some very loose ones, and also some that are lineless, so you gotta understand maybe even tkmiz himself has no single conscious style of his own, being the messy result partially a consequence of his time-saving workflow.

You should learn to mimic his style of anatomy/shapes first (if that's your goal).
Then you should learn his colors and shading style.
Then, after you think you're good enough, you can start getting messy and trying to achieve all this rushed MS Paint feeling to it. Otherwise it won't look natural: either it will be messy and bad or too stiff and looking like a "controlled mess".