Welcome to the first exercise in this course. Your instructions can all be found in the TODO pane at the bottom of the IDE. There you'll find a helpful entry that says
TODO: Start here!
Also, remember that you've got a reference solution to this exercise over in the 1.3.02-Solution-DrawAStarfield folder! That project has the exact same TODOs, so if you get stuck on a particular part, you'll be able to get yourself un-stuck!