There's really no way to earn money online without actually investing something whether that be your time or even some money.
Making money online can be done but requires hard work and time. And both those things are something that you're investing into making money.
If someone tells you that you can make money overnight or even just make money without investing anything or doing anything then it's a scam.
You can make money by taking surveys, blogging, doing freelance work, writing for others etc.
To create a website to make money you'll need to get a domain name for at least $11.00 per year and web hosting for $4.00 per month.
It's very cheap to get started with a website that could eventually earn you a lot of money in the future.
Be aware that if you create a website to make money from it don't expect to earn money overnight with your website. It can takes years, even a decade to see any good amount of money.
You need website traffic to earn money. To get that website traffic you need to create a lot of good content that has the right keywords in it.
Make the website content helpful to others. The longer the blog article the better as you have more a chance at placing long tail keywords into the blog article which will in time send you website traffic.