To operate in this industry, you also need to know some knowledge! Otherwise, if you meet knowledgeable people and say something wrong, they will think you are lying. If you understand it yourself, you will be more convincing to customers who have no knowledge of Feng Shui, and your closing rate will be higher!
The precautions you mentioned should refer to whether there are any particularities, right? That is, are there any taboos or anything like that? This is just a business, anyone can do it, there is nothing to worry about!