I'm new myself but for a subjob you need to go to Mhaura and speak to Vera or go to Selbina and speak to Isacio.

For Vera's quest you need a rarab tail from mighty rarabs, dhalmel saliva from bull dhamels, and a bloody robe from bogys.

For Isacio's you need a magicked skull from ghouls, damselfly worm from a damselfly, and a crab apron from Snippers.