There are many ways that you can attempt to make money, both online and offline but sadly, some of them are not guaranteed to make you a lot of money. If you start up a website, start a business, try to sell things online or see you can make money blogging or vlogging then there is no guarantee that you will be able to generate an income. You could find that you will be working very hard and not generating a lot of traffic to your pages and therefore not making a lot of money.
If you get an offline job for a reputable company, then you will be guaranteed to get money and a lot of people choose to do this so that they know they will get paid. The problem with doing work online is that there is less of a guarantee that you will be paid, even if you are working for someone. A good way to protect yourself is to go through a reputable website. There are many out there, where you can find freelance work and they handle the payments so that you know that you will be paid. Obviously you will want to check the site to make sure that it has a good reputation and you should be able to find online reviews that will help you with that.
The same places where you find those online reviews, you may also be able to find out more information about opportunities for making money online. There are a lot of them and there are many money making forums and blogs where you can find out more information about them. They will tell you where to find the sites, how you get paid and you will also be able to find out about the ones to avoid. In fact people may be more likely to mention ones where they were not paid rather than ones where they were.
There is another issue in that although sites may be good for making some money, if you want to make a significant amount then you may have to do very specific things. There are sites where you can make money answering surveys, for example but even if you sign up to a lot of these and do every survey they send you, the chances are that you will not get that many done and so will not earn that much money. You might be guaranteed to be paid, but it may not be as much money as you were hoping for or perhaps as you needed.
Although there is money to be made, you will need to be careful where you choose to earn it from. You need to consider that some place may not pay you and others may only pay small amounts. Some will not have any guarantee of pay or they may not have a consistent income available. Think about what sort of income you need and then you should be able to match that up with the sort of job that will provide you with that income.