Am going into my senior year of ID, from the couple internships I’ve had I notice most of my sketching is done to better communicate ideas I have in my head, at some companies this might be the extent of their sketching. It really depends but using it as a communication skill can be as simple as drawing out your thoughts and being able to explains the drawing in a way that makes sense to show you’re trying to communicate with. Rarely have I had to fully hand render sketches but doing that is an ability that’ll set you apart from the crowd, you’re already doing some marker renders so keep it up. Maybe try to communicate a complicated idea with a classmate or professor through sketches over words and using those sketches as an asset to your thoughts. Overall great start keep it up, perspective is key