I will be 26 years old soon, and I want to cultivate a hobby: piano, painting or photography.

Piano is difficult to learn without a teacher, even if there is a teacher, it is not easy to play when you are old. Photography requires equipment, such as a SLR. Of course, mobile phones can also play photography and PP pictures now, but this is not a hobby. Everyone will. If you really want to play photography, you need to buy a SLR. For SLR, there is a saying that SLR is poor for three generations. So I recommend painting. Painting can cultivate sentiment and cultivate self-cultivation.