First of all, to learn Feng Shui, you must be a very sincere person and a very upright person. You can't use feng shui to do bad things and do things that are against morality. You should help others more. You can't cheat people with your knowledge of geomantic omen, it will bite you.
After you perfect your internal structure, you will do a lot.
And the most effective way is: study! In addition to learning some skills, the most important thing is to learn traditional culture and cultivate one's morality. I recommend two books to you: Four Disciplines by Fan and Tan Caigen.