/ic/ - Artwork/Critique

I've been drawing from imagination 'for fun' after taking a break from drawabox, since drawing 250 boxes isn't my idea of fun and I'm not learning shit from it
only thing here that isn't from imagination is the sword guy

if I want to learn basic construction, gesture and foreshortening what should I do, besides draw from reference? FWAP?
my art goals aren't anything lofty, all I'm looking to do is cartoon style stuff with a lot of color and creativity ala Moebius or Bagboss
also thinking of getting a tablet so I can deconstruct references and use them to make finished works as opposed to just sketches