Exclude this options that they have to get a job and save up money because if it was so easy to get a good paying job, some of them may not even be trading.
You're asking people to exclude the option of getting a good job, but that’s just the best thing to do. If you have searched for a job and couldn’t get one, then you can start participating in all these online services. If you have any skills, you can just display them on the forum here, and anyone interested will contact you. You can also participate in bounties and airdrops. If you are lucky, you might be able to raise a small amount to start trading, but we should know that most bounties and airdrops are currently scams, so you have to be careful.
What will you advise, would you advise them that at a level when they are sure of their knowledge should try to convince other people they know to give them some money as investment or convince strangers to invest in them?
That's what I will never advise a trader to do. No matter how professional you are, you shouldn't borrow money from anyone to trade. If you borrow money to trade, in case things go against you and you end up losing the money, how will you be able to pay it back? If you are trading with borrowed money, then you will be under tension, which might even cause you to lose money easily. Just make sure you trade with your money, which should be what you can afford to lose.