Complete designing any remaining screens focusing on using auto layout and using the color and text styles that you've created.
With your auto layout screens created, identify frames within your design that have been duplicated across your screens. These repeated frames are referred to as a components. With these repeated frames identified (buttons, lists, cards etc) go ahead and create a series of component sets that will help you scale your UI design consistently
Having created a series of component sets, apply your newly created components to your hi-fidelity screens, replacing the original frames you'd designed with.