Personally, I feel that if you really want to learn, first see if you have any extra time, because art, whether watercolor or something else, is a time-consuming thing.

Secondly, the foundation of watercolor painting is based on your sense of modeling and color. You can't rush for success.

To sum up, I think if you really want to learn, you should actually enroll in an art foundation class to learn the basics. If the time is not very full, then buy some entry-level sketches first and copy them with entry-level color scenes. Cultivate it gradually. If you have more questions, you can go to Weibo @ 99th Floor Bear.