1
Create an basic angular app where you type in a text box and it shows up as text somewhere else on the screen.
2
Create an app where there is an array of data in the service that is shown on the screen as a list
3
Create an app where there is a list of data on the screen (stored in a service) where you can type to filter what's shown in the list
4
Create an app hitting an api (swapi.co, birdapi.com, pokeapi, marvel api, etc)
5
Make a larger app if you have time.