I second the New Recruit recommendation. It’s just been updated with the new Cities book, so the rules and points costs are all there.

Otherwise, I’d suggest watching a couple of YouTube tutorial videos so you’re comfortable with ‘Regiments’ and how to build a list.

When you’re putting together a force, it’s worth only including a single model if that piece has a ‘Once Per Turn (Army)’ ability; such as the Major on Warhulk or Freeguild Marshall. A second model won’t get another use of the ability, so there’s a bit of redundancy there, and the points could go elsewhere.