I started out in a 4 year college straight out of high school and claimed a major in music education. After the first couple of years I found that I did not want that as my career path but it was too late to turn back. I wound out dropping out and entering the work force in the food industry. A number of years later it was apparent that I had reached my top pay as a general manager of the restaurant and could barely pay for myself to live off of that little of pay.
I say all of this to say this: You can enter this trade at any time. I wish I had started right out of high school in the trade, however, I don’t regret the experiences I have had along the way in other trades.
I decided to drop out of management and go to a 2 year college to attempt an associates in welding technology. I graduated summa cum laude and have never regretted that decision to this day. If you like working with your hands, creating things from scratch, figuring out puzzles, and making a good earning in the meantime…consider this trade. But remember, you absolutely do not have to come out of the gate swinging a TIG rig over your head.
Generally speaking though, there are lots of contexts that can make or break a specific trade for you. For example, you might be a welder in a shop, or you might work with a mechanic in the field, or you might be a diver working on ships and oil rigs.
I might focus on what sort of work you want and see if you can find/follow/connect with people who are doing what you want to do.
For example - Kurtis from https://www.cuttingedgeengineering.com.au/about-cutting-edge-engineering-australia.html
He has a strong YouTube presence, runs his own shop, and was a former field mechanic. His welding skills are impressive but it's only part of what he does - https://www.youtube.com/watch?v=jPqAeMIJIxU