In terms of fitness, you can choose the exercise that suits you according to your physical condition, that is, hobbies, and stick to it often.
Rest must be guaranteed, especially adequate sleep, and it is best to sleep for a while at noon every day.
Interpretation of dreams: In fact, you may have been scared by snakes when you were a child. Left a deep memory in your heart. But it's vague. If you really want to know the answer, I suggest you see a psychologist. I believe you will get the answer you want to know.