First, there's no easiest way to make money, it is your approach, focus, consistency, and hard work that will determine if making money online will be easy for you.
That being said there are many businesses/ skills you can start to make money easily.
Freelancing
Cryptocurrency
WhatsApp Marketing
Affiliate Marketing
Copywriting
Car tracking
E-commerce
Now, all 7 will surely grant you the opportunity to earn a decent amount of money online. You can start from the easiest(earn little) to the hardest (earn a huge load of money)
But bear in mind that even the easiest way will take some time to get the grip of it. Then everything flows smoothly as you learn more and more about it.
Feel free to engage this directly. Try to focus on one thing at a time, then master a few skills related to that thing you picked. This will make you unique and the most wanted person in that field. That is provide rare services that the competitor may not provide.

Good luck