Since it’s done with primitives( if I remember correctly) just add 2 toruses make them thin. That will be the 3 cross lines. Then use several cylinders for the up and down lines. Then use a black material. Later when you start working with editing meshes you will figure out the better solution of loop cuts and inset with multiple materials. You can also replace it with grease pencil when you get to that course. So many options.
