It would be an interesting exercise to come up with some possible new professions for Chapter 2, but personally I think it would be more fun to come up with some new races.
For instance :
a) Troll : Ogre equivalent. Not very bright but strong. Rather like wrestlers. Good natural defence, can only use clubs as weapons.
Motto : ‘If it moves, hit it. If it doesn’t move, wait until it does move, then hit it.’
Sexes : Unknown. Males are easily confused between females and small hills.
Diet : Trees. People. Animals. Vegetables. Minerals. Anything in between.
b) Dwarf : Vertically-challenged. All of their drinking songs consist of the word ‘gold’. Have elevated beards to an art-form. Can only use axes.
Motto : ‘You will be the same height as me if I chop off your legs.’
Sexes : Hard to tell as both males and females have beards. Asking another dwarf for a date can lead to unfortunate consequences.
Diet : Dwarf bread (can also double as a weapon). Edible berries. Very strong cheese. Ale. More ale. Lots more ale.
c) Elf : Tall. Thin. Pointy ears. Very green. Continually moan about people destroying the environment. Will only use bows as they are eco-friendly.
Motto : ‘Save the Droknar!’ and ‘Mergoyles are people too!’
Sexes : Three. Male, female and environmentalist.
Diet : Very limited. They wont eat meat, fish, eggs, curry, or anything interesting. Explains why they are so thin.
There must be others….
D

I was very careful not to mention some of the other dwarven delicacies in Discworld - no Rat-onna-Stick!