These are really nice! I like the cartoon style. I think the work would benefit from cleaner linework.
My workflow is to draw pencil outlines, ink over, then erase. I'm trying to lean less on the pencil for detail and go directly to ink, but that's for the future. Inking is always done very carefully and slowly -- if there's speed, it's at the outline stage.
I use a fine propelling pencil for outlining, and a Rotring Isograph (0.1 mm nib) for inking.
Thanks!