I have a lot of free time. I want to learn divination, but I don't know how to start. Is it easier to learn Chinese characters or to read palms? What book should I read first if I have no foundation?

Don't predict the horoscope, because you think too high. This can only be a hobby. As for where to start, learn Chinese well first. As for Zhouyi and other books, don't worry. Everyone has a different understanding of this thing. Don't look at what has been translated, look at the classical Chinese and understand it yourself. Don't use software to arrange it yourself. It is enough to know heavenly stems and earthly branches's five-element cycle, but it is not reliable to learn from the teacher.