I am a UI designer who is almost 40 years old. I feel that this position is mostly occupied by young people. I want to know where my future will be?

I used to do almost the same job as you. I was doing advertising design, that is, graphic creative design. I worked for 16 years. As I got older, my thinking slowly failed to keep up with the times. , I have been working for 16 years. Whether it is my body or my eyes, because I often sit, I suffer from sciatica, cervical spondylosis, myopia, prostatitis, and sexual dysfunction. I didn’t make much money, but I was very tired. I have now changed my career to become a Feng Shui master. Running outside every day, drinking tea and chatting with people, I feel like this is life.