Yeah, I understand your pain. I have seen someone here in this forum discouraging someone from trading. It's really bad but you wouldn't give up either way. Don't let others define you. First what you do is find the basic places you could learn about trading ( some exchanges offer such knowledge) then you can read books and maybe try copy trading if you want
When someone has that motivation of doing something that he loves and you discourage that person I don't think it would be easy to convince him or her to go back to that idea ever again.
The best is never to speak ill about that person's intentions or rather you use supportive words to lift that person up no matter how long it takes before learning and be good at it, is worth it I'll tell you for free.
If someone is ready to trade just encourage and support whosoever that person is rather than killing the person's dream of becoming a better trader.