I want to learn Feng Shui, where should I start?

I suggest you start by understanding what Feng Shui is, at least have a basic understanding of Feng Shui, and then learn some basic concepts. There are many terms in Feng Shui, and their concepts are complicated and easy to remember. It is recommended to learn through cases. Many people will recommend various introductory books to you. In fact, it is better to find a reliable teacher. Teacher Hou Zongyuan’s class is good and you can download it on Baidu.