but am scared of the lost and how long it will take him to understand what his doing, because it hasn't been very easy for me. So what your opinion please I need help?
14 years are less, i think you should wait for him to be around 18. Because money is not everything, he should enjoy his life but if his enjoyment is in learning trading then i think only teaching him/her will be a good idea like you can make him Demo accounts or teach him backtesting trading. But for both, he needs, great knowledge of trading fundamentals, and i was at that kid place and my enjoyment is in learning trading from a person (you) which i don't know-how is in trading, but if you are good, then i think i will become rich around 25 because until then, i will be a pro trader and memory is quite remarkable i early age so that's a good age to teach some kid trading.
But you should have to give him moral lessons like, the use of money, how to control sentiments, and how to control your behaviors along the market behavior so that your loved ones do not be affected by you. And you also have to teach him money is not everything, etc., etc. But that's a good opportunity for a kid to learn to trade because if i were given a chance i will take it (eager to learn it) just like that kid.
Advice for you, please do not spoil the kid if you are going to teach him, because it depends on you, how you reshape his mind. And be polite and make the learning process fun for kids. Plus if you still afraid to teach him then simply ask his parents first if they allow you to then proceed.