You’re welcome! Good luck! In my distant past I leaned to make Lakota tipis covers from canvas, and stayed in one for a summer. Though I am not a native American, it changed my life.
Instead of making two shapes you can also draw the block shape based on the finished cylinder, when you get to that point, and you may find alignment easier that way. But this way isn’t hard either when you have some practice moving and aligning shapes in SketchUp.