theres a whole bunch of pre-set challenge ideas under here id love to see some of them! there's a few easy tips I could think of off the top of my head under there too!
you're welcome to do whatever you like with this base!
other challenge ideas could be face shapes, noses (animal or human!), textures (feather, fur, felt, skin, scale, quills), tools (scissors, mouse, etc) or clothing!
the hand & glass challenge, you're supposed to draw the hand, holding the glass, hopefully the cups are all pretty differently held!