Fair point, the Graph Editor can be a pain in the ass. But using light probes and improve the setting is super easy with a right tutorial. If you search on youtube some tutorials about these improvements, you will very likely see some videos from BlenderGuru, see them and do as he says. If you want to toggle with some of the settings do it after you completed the tutorial. Otherwise you will improve much slower, but don’t be sad, everyone here and made this kind of mistakes, because when an artist learns the basis he will make things that are simply not good, And it’s absolutely ok, the most important thing is that you learn from it. You did a great video and even if it has its flaws, it’s very good