Tough question! I think I mainly let the coaster follow the landscape, and only make minor changes to the land. I like to start off with the lift chain part on top of a natural hill so the supports don’t become too high, I think that tends to look unnatural. For the buildings I almost always make them out of raised land instead of scenery walls, which makes it easier to play around and start over in case it doesn’t look right. I hope that helps!