@MrMoody - Yes, understanding the law and being impartial are both important. There are many routes for training but I think the training you choose depends on what your ultimate aim is. If you’re working on the legal profession, then I don’t think you should rely on Internet training.
That’s my bias I guess. As a lawyer you are called upon to understand the nuances of the law which can change quickly. You may be called upon to do things like create an arbitration agreement between two disputing parties.
You don’t want to rely on generic training that you get from the Internet. Rather you should insist on courses from your law school. But if you are going to be an arbiter in a workplace setting then I think that you can be more flexible.