hey, you might find our playlists on youtube helpful for these questions: https://www.youtube.com/playlist?list=PLlJHGGklthGl1aRSV3LSaAnSwcO3xhBq6 and https://www.youtube.com/playlist?list=PLlJHGGklthGlUVZlNhG5I0ZK8u1h6UfZ9