I have worked as a full time freelancer for several years. I think I'm up to about 9 years in total, including both part and full time. I have written and published a handful of ebooks, reports and "how to guides" and I will say to you as I've said to many others.
If you're new, and you're looking for an "easy" way to generate some extra cash per month. I'd recommend Fiverr and SEOClerks. It's easy to understand and the platforms gives you literally everything you need. You do your task and you'll get paid for doing them. Easy as that. You don't have to struggle with shopping carts or your own website and things like that so these platforms makes everything so much easier.
Freelancer and similar sites are harder (in my opinion) to start with, because you would need to showcase your skills and talents in a portfolio. And that portfolio is easier to get on Fiverr or SEOClerks. It doesn't matter how much you've earned or how many orders you've fulfilled previously. What matters is your communication skills and the quality of your work.
And I don't talk about spelling issues or grammar mistakes. None of that. To communicate properly with your clients is the most vital thing. That's how you turn "naysayers" and "potential clients" into money spending buyers and long term clients.