It's really good! You could make a sketch layer, then make another layer with thicker lineart (use the webink brush if you're using muro).
Also, like blue said, make sure to make another layer under the lineart layer for coloring! That way color doesn't go over the lines.
If you're confused about all these layers, here's the order (top to bottom):
Lineart: Ink your sketch with a thicker brush.
Color: Underneath the Lineart.
Sketch: Sketch your drawing out before the final lineart.