Male, 34 years old, now wants to learn a technology. What is appropriate?

You are 34 years old. I suggest you learn to be a chef.

Because there is only this industry, regardless of age.

2. You can learn some massage physiotherapy techniques.

If you are interested in breeding and planting, you might as well give it a try.

But I still suggest that you look at it according to your hobbies, and that's what you like. I'm just giving some advice for reference only.