Learn a profession that has lots of math. Right now, most of these jobs are being filled with immigrants, but as the US becomes less attractive to immigrants (their opportunities are better than ours), those jobs will do better here. They already pay well now.
I'm talking tech jobs, engineering, advanced medical. Avoid most of the sociology, political science, women's studies, history, art, music, etc.
Those are great hobbies (and you can take them if you have a parent or spouse to support you), but if you want to support yourself they aren't so good.
Then it is good to learn a bit of camping and farming
to help yourself survive if the SHTF.
That's my advice.
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