The only problem is that we don't have enough money to invest in a business; if not, you really need to take out a loan to be able to invest in it, though I agree it is very risky, and you are not secured that your business will be successful. What most other advice is that if you really want to invest in a business and you need to take a loan, you should first find a job so that even if your business is unsuccessful, you still have a backup plan or you can still pay your debt, though it would be painful, at least you can still recover.
Not all people have a knack for business and not all people are good entrepreneurs. We can try to establish our own business but if we don't have a knack for it even with the knowledge, it won't flourish. But for those who are willing to try, if they have funds then do thorough research and after knowing the left and right start the business asap. Time is essential so it is best not to waste time. But for those who don't have the fund, you better look for a stable job, save, and save more. Job is an assurance that we will have funds every month so we need to secure it before securing our own business in the futre.